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Finding the Fourth Proportional to 28,045.61, 42,059.31 and 9,320.61

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Solution

The fourth proportional to 28,045.61, 42,059.31 and 9,320.61 is: 13,977.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,045.61 : 42,059.31 = 9,320.61 : x
  2. Step 2: Convert to fraction form
    28,045.61/42,059.31 = 9,320.61/x
  3. Step 3: Cross multiply
    28,045.61x = 42,059.31 × 9,320.61
  4. Step 4: Simplify right side
    28,045.61x = 392,018,425.38
  5. Step 5: Solve for x
    x = 392,018,425.38/28,045.61
  6. Step 6: Final answer
    x = 13,977.89

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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.