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Finding the Fourth Proportional to 28,314.47, 39,074 and 15,567.87

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Solution

The fourth proportional to 28,314.47, 39,074 and 15,567.87 is: 21,483.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,314.47 : 39,074 = 15,567.87 : x
  2. Step 2: Convert to fraction form
    28,314.47/39,074 = 15,567.87/x
  3. Step 3: Cross multiply
    28,314.47x = 39,074 × 15,567.87
  4. Step 4: Simplify right side
    28,314.47x = 608,298,952.38
  5. Step 5: Solve for x
    x = 608,298,952.38/28,314.47
  6. Step 6: Final answer
    x = 21,483.68

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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.