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Finding the Fourth Proportional to 52,327.71, 78,490.89 and 12,885.17

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Solution

The fourth proportional to 52,327.71, 78,490.89 and 12,885.17 is: 19,327.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,327.71 : 78,490.89 = 12,885.17 : x
  2. Step 2: Convert to fraction form
    52,327.71/78,490.89 = 12,885.17/x
  3. Step 3: Cross multiply
    52,327.71x = 78,490.89 × 12,885.17
  4. Step 4: Simplify right side
    52,327.71x = 1,011,368,068.65
  5. Step 5: Solve for x
    x = 1,011,368,068.65/52,327.71
  6. Step 6: Final answer
    x = 19,327.58

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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.