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Finding the Fourth Proportional to 39,045.71, 53,883.01 and 21,140.71

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Solution

The fourth proportional to 39,045.71, 53,883.01 and 21,140.71 is: 29,174.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,045.71 : 53,883.01 = 21,140.71 : x
  2. Step 2: Convert to fraction form
    39,045.71/53,883.01 = 21,140.71/x
  3. Step 3: Cross multiply
    39,045.71x = 53,883.01 × 21,140.71
  4. Step 4: Simplify right side
    39,045.71x = 1,139,125,342.61
  5. Step 5: Solve for x
    x = 1,139,125,342.61/39,045.71
  6. Step 6: Final answer
    x = 29,174.15

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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.