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Finding the Fourth Proportional to 10,642.98, 15,978.57 and 9,092.94

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Solution

The fourth proportional to 10,642.98, 15,978.57 and 9,092.94 is: 13,651.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,642.98 : 15,978.57 = 9,092.94 : x
  2. Step 2: Convert to fraction form
    10,642.98/15,978.57 = 9,092.94/x
  3. Step 3: Cross multiply
    10,642.98x = 15,978.57 × 9,092.94
  4. Step 4: Simplify right side
    10,642.98x = 145,292,178.30
  5. Step 5: Solve for x
    x = 145,292,178.30/10,642.98
  6. Step 6: Final answer
    x = 13,651.46

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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.