Home / 20,128,517.80-30,192,776.70-12,948,159.40

Finding the Fourth Proportional to 20,128,517.80, 30,192,776.70 and 12,948,159.40

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Solution

The fourth proportional to 20,128,517.80, 30,192,776.70 and 12,948,159.40 is: 19,422,239.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128,517.80 : 30,192,776.70 = 12,948,159.40 : x
  2. Step 2: Convert to fraction form
    20,128,517.80/30,192,776.70 = 12,948,159.40/x
  3. Step 3: Cross multiply
    20,128,517.80x = 30,192,776.70 × 12,948,159.40
  4. Step 4: Simplify right side
    20,128,517.80x = 390,940,885,440,206
  5. Step 5: Solve for x
    x = 390,940,885,440,206/20,128,517.80
  6. Step 6: Final answer
    x = 19,422,239.10

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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.