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Finding the Fourth Proportional to 57,336, 86,007.24 and 20,400

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Solution

The fourth proportional to 57,336, 86,007.24 and 20,400 is: 30,601.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,336 : 86,007.24 = 20,400 : x
  2. Step 2: Convert to fraction form
    57,336/86,007.24 = 20,400/x
  3. Step 3: Cross multiply
    57,336x = 86,007.24 × 20,400
  4. Step 4: Simplify right side
    57,336x = 1,754,547,696
  5. Step 5: Solve for x
    x = 1,754,547,696/57,336
  6. Step 6: Final answer
    x = 30,601.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.