Home / 21,005,710.60-31,508,565.90-12,481,659.40

Finding the Fourth Proportional to 21,005,710.60, 31,508,565.90 and 12,481,659.40

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Solution

The fourth proportional to 21,005,710.60, 31,508,565.90 and 12,481,659.40 is: 18,722,489.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005,710.60 : 31,508,565.90 = 12,481,659.40 : x
  2. Step 2: Convert to fraction form
    21,005,710.60/31,508,565.90 = 12,481,659.40/x
  3. Step 3: Cross multiply
    21,005,710.60x = 31,508,565.90 × 12,481,659.40
  4. Step 4: Simplify right side
    21,005,710.60x = 393,279,187,746,254.44
  5. Step 5: Solve for x
    x = 393,279,187,746,254.44/21,005,710.60
  6. Step 6: Final answer
    x = 18,722,489.10

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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.