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Finding the Fourth Proportional to 19,331.70, 28,997.55 and 15,443.70

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Solution

The fourth proportional to 19,331.70, 28,997.55 and 15,443.70 is: 23,165.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,331.70 : 28,997.55 = 15,443.70 : x
  2. Step 2: Convert to fraction form
    19,331.70/28,997.55 = 15,443.70/x
  3. Step 3: Cross multiply
    19,331.70x = 28,997.55 × 15,443.70
  4. Step 4: Simplify right side
    19,331.70x = 447,829,462.94
  5. Step 5: Solve for x
    x = 447,829,462.94/19,331.70
  6. Step 6: Final answer
    x = 23,165.55

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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.