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Finding the Fourth Proportional to 27,930.16, 38,543.88 and 15,355

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Solution

The fourth proportional to 27,930.16, 38,543.88 and 15,355 is: 21,190.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,930.16 : 38,543.88 = 15,355 : x
  2. Step 2: Convert to fraction form
    27,930.16/38,543.88 = 15,355/x
  3. Step 3: Cross multiply
    27,930.16x = 38,543.88 × 15,355
  4. Step 4: Simplify right side
    27,930.16x = 591,841,277.40
  5. Step 5: Solve for x
    x = 591,841,277.40/27,930.16
  6. Step 6: Final answer
    x = 21,190.04

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.