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Finding the Fourth Proportional to 28,807.52, 39,754.36 and 15,559.52

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Solution

The fourth proportional to 28,807.52, 39,754.36 and 15,559.52 is: 21,472.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,807.52 : 39,754.36 = 15,559.52 : x
  2. Step 2: Convert to fraction form
    28,807.52/39,754.36 = 15,559.52/x
  3. Step 3: Cross multiply
    28,807.52x = 39,754.36 × 15,559.52
  4. Step 4: Simplify right side
    28,807.52x = 618,558,759.51
  5. Step 5: Solve for x
    x = 618,558,759.51/28,807.52
  6. Step 6: Final answer
    x = 21,472.13

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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.