Home / 20,111,838.30-30,167,757.45-12,931,479.90

Finding the Fourth Proportional to 20,111,838.30, 30,167,757.45 and 12,931,479.90

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Solution

The fourth proportional to 20,111,838.30, 30,167,757.45 and 12,931,479.90 is: 19,397,219.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,111,838.30 : 30,167,757.45 = 12,931,479.90 : x
  2. Step 2: Convert to fraction form
    20,111,838.30/30,167,757.45 = 12,931,479.90/x
  3. Step 3: Cross multiply
    20,111,838.30x = 30,167,757.45 × 12,931,479.90
  4. Step 4: Simplify right side
    20,111,838.30x = 390,113,749,092,750.25
  5. Step 5: Solve for x
    x = 390,113,749,092,750.25/20,111,838.30
  6. Step 6: Final answer
    x = 19,397,219.85

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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.