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Finding the Fourth Proportional to 39,187.71, 54,079.02 and 22,420.71

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Solution

The fourth proportional to 39,187.71, 54,079.02 and 22,420.71 is: 30,940.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,187.71 : 54,079.02 = 22,420.71 : x
  2. Step 2: Convert to fraction form
    39,187.71/54,079.02 = 22,420.71/x
  3. Step 3: Cross multiply
    39,187.71x = 54,079.02 × 22,420.71
  4. Step 4: Simplify right side
    39,187.71x = 1,212,490,024.50
  5. Step 5: Solve for x
    x = 1,212,490,024.50/39,187.71
  6. Step 6: Final answer
    x = 30,940.57

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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.