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Finding the Fourth Proportional to 28,062, 38,726.40 and 15,487.56

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Solution

The fourth proportional to 28,062, 38,726.40 and 15,487.56 is: 21,373.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,062 : 38,726.40 = 15,487.56 : x
  2. Step 2: Convert to fraction form
    28,062/38,726.40 = 15,487.56/x
  3. Step 3: Cross multiply
    28,062x = 38,726.40 × 15,487.56
  4. Step 4: Simplify right side
    28,062x = 599,777,443.58
  5. Step 5: Solve for x
    x = 599,777,443.58/28,062
  6. Step 6: Final answer
    x = 21,373.30

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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.