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Finding the Fourth Proportional to 28,008.92, 42,013.82 and 8,289.47

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Solution

The fourth proportional to 28,008.92, 42,013.82 and 8,289.47 is: 12,434.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,008.92 : 42,013.82 = 8,289.47 : x
  2. Step 2: Convert to fraction form
    28,008.92/42,013.82 = 8,289.47/x
  3. Step 3: Cross multiply
    28,008.92x = 42,013.82 × 8,289.47
  4. Step 4: Simplify right side
    28,008.92x = 348,272,426.23
  5. Step 5: Solve for x
    x = 348,272,426.23/28,008.92
  6. Step 6: Final answer
    x = 12,434.34

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1.5x scale

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.