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Finding the Fourth Proportional to 52,279.80, 78,419.70 and 12,836.40

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Solution

The fourth proportional to 52,279.80, 78,419.70 and 12,836.40 is: 19,254.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,279.80 : 78,419.70 = 12,836.40 : x
  2. Step 2: Convert to fraction form
    52,279.80/78,419.70 = 12,836.40/x
  3. Step 3: Cross multiply
    52,279.80x = 78,419.70 × 12,836.40
  4. Step 4: Simplify right side
    52,279.80x = 1,006,626,637.08
  5. Step 5: Solve for x
    x = 1,006,626,637.08/52,279.80
  6. Step 6: Final answer
    x = 19,254.60

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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.