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Finding the Fourth Proportional to 28,655.60, 42,988.76 and 9,934.80

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Solution

The fourth proportional to 28,655.60, 42,988.76 and 9,934.80 is: 14,904.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,655.60 : 42,988.76 = 9,934.80 : x
  2. Step 2: Convert to fraction form
    28,655.60/42,988.76 = 9,934.80/x
  3. Step 3: Cross multiply
    28,655.60x = 42,988.76 × 9,934.80
  4. Step 4: Simplify right side
    28,655.60x = 427,084,732.85
  5. Step 5: Solve for x
    x = 427,084,732.85/28,655.60
  6. Step 6: Final answer
    x = 14,904.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.