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Finding the Fourth Proportional to 51,591.98, 77,374.98 and 19,991.18

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Solution

The fourth proportional to 51,591.98, 77,374.98 and 19,991.18 is: 29,981.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,591.98 : 77,374.98 = 19,991.18 : x
  2. Step 2: Convert to fraction form
    51,591.98/77,374.98 = 19,991.18/x
  3. Step 3: Cross multiply
    51,591.98x = 77,374.98 × 19,991.18
  4. Step 4: Simplify right side
    51,591.98x = 1,546,817,346.11
  5. Step 5: Solve for x
    x = 1,546,817,346.11/51,591.98
  6. Step 6: Final answer
    x = 29,981.74

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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.