Home / 20,521,423.20-30,761,830.80-9,719,738.40

Finding the Fourth Proportional to 20,521,423.20, 30,761,830.80 and 9,719,738.40

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Solution

The fourth proportional to 20,521,423.20, 30,761,830.80 and 9,719,738.40 is: 14,569,990.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521,423.20 : 30,761,830.80 = 9,719,738.40 : x
  2. Step 2: Convert to fraction form
    20,521,423.20/30,761,830.80 = 9,719,738.40/x
  3. Step 3: Cross multiply
    20,521,423.20x = 30,761,830.80 × 9,719,738.40
  4. Step 4: Simplify right side
    20,521,423.20x = 298,996,948,081,062.75
  5. Step 5: Solve for x
    x = 298,996,948,081,062.75/20,521,423.20
  6. Step 6: Final answer
    x = 14,569,990.84

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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.