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Finding the Fourth Proportional to 37,989.55, 52,422.95 and 20,993.63

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Solution

The fourth proportional to 37,989.55, 52,422.95 and 20,993.63 is: 28,969.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,989.55 : 52,422.95 = 20,993.63 : x
  2. Step 2: Convert to fraction form
    37,989.55/52,422.95 = 20,993.63/x
  3. Step 3: Cross multiply
    37,989.55x = 52,422.95 × 20,993.63
  4. Step 4: Simplify right side
    37,989.55x = 1,100,547,688.09
  5. Step 5: Solve for x
    x = 1,100,547,688.09/37,989.55
  6. Step 6: Final answer
    x = 28,969.75

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.