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Finding the Fourth Proportional to 20,602.92, 28,424.58 and 13,533.16

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Solution

The fourth proportional to 20,602.92, 28,424.58 and 13,533.16 is: 18,670.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.92 : 28,424.58 = 13,533.16 : x
  2. Step 2: Convert to fraction form
    20,602.92/28,424.58 = 13,533.16/x
  3. Step 3: Cross multiply
    20,602.92x = 28,424.58 × 13,533.16
  4. Step 4: Simplify right side
    20,602.92x = 384,674,389.07
  5. Step 5: Solve for x
    x = 384,674,389.07/20,602.92
  6. Step 6: Final answer
    x = 18,670.87

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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.