Home / 19,931,872.80-29,897,809.20-12,721,989.90

Finding the Fourth Proportional to 19,931,872.80, 29,897,809.20 and 12,721,989.90

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Solution

The fourth proportional to 19,931,872.80, 29,897,809.20 and 12,721,989.90 is: 19,082,984.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,931,872.80 : 29,897,809.20 = 12,721,989.90 : x
  2. Step 2: Convert to fraction form
    19,931,872.80/29,897,809.20 = 12,721,989.90/x
  3. Step 3: Cross multiply
    19,931,872.80x = 29,897,809.20 × 12,721,989.90
  4. Step 4: Simplify right side
    19,931,872.80x = 380,359,626,674,527.06
  5. Step 5: Solve for x
    x = 380,359,626,674,527.06/19,931,872.80
  6. Step 6: Final answer
    x = 19,082,984.85

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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.