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Finding the Fourth Proportional to 21,775.96, 30,043.50 and 15,059.16

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Solution

The fourth proportional to 21,775.96, 30,043.50 and 15,059.16 is: 20,776.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,775.96 : 30,043.50 = 15,059.16 : x
  2. Step 2: Convert to fraction form
    21,775.96/30,043.50 = 15,059.16/x
  3. Step 3: Cross multiply
    21,775.96x = 30,043.50 × 15,059.16
  4. Step 4: Simplify right side
    21,775.96x = 452,429,873.46
  5. Step 5: Solve for x
    x = 452,429,873.46/21,775.96
  6. Step 6: Final answer
    x = 20,776.58

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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.