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Finding the Fourth Proportional to 28,854, 39,818.52 and 15,606

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Solution

The fourth proportional to 28,854, 39,818.52 and 15,606 is: 21,536.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,854 : 39,818.52 = 15,606 : x
  2. Step 2: Convert to fraction form
    28,854/39,818.52 = 15,606/x
  3. Step 3: Cross multiply
    28,854x = 39,818.52 × 15,606
  4. Step 4: Simplify right side
    28,854x = 621,407,823.12
  5. Step 5: Solve for x
    x = 621,407,823.12/28,854
  6. Step 6: Final answer
    x = 21,536.28

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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.