Home / 20,702,981.20-31,031,143.80-9,925,445.20

Finding the Fourth Proportional to 20,702,981.20, 31,031,143.80 and 9,925,445.20

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Solution

The fourth proportional to 20,702,981.20, 31,031,143.80 and 9,925,445.20 is: 14,876,983.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702,981.20 : 31,031,143.80 = 9,925,445.20 : x
  2. Step 2: Convert to fraction form
    20,702,981.20/31,031,143.80 = 9,925,445.20/x
  3. Step 3: Cross multiply
    20,702,981.20x = 31,031,143.80 × 9,925,445.20
  4. Step 4: Simplify right side
    20,702,981.20x = 307,997,917,280,219.75
  5. Step 5: Solve for x
    x = 307,997,917,280,219.75/20,702,981.20
  6. Step 6: Final answer
    x = 14,876,983.87

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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.