Home / 21,002,547.40-31,456,581.90-12,499,491.40

Finding the Fourth Proportional to 21,002,547.40, 31,456,581.90 and 12,499,491.40

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Solution

The fourth proportional to 21,002,547.40, 31,456,581.90 and 12,499,491.40 is: 18,721,123.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002,547.40 : 31,456,581.90 = 12,499,491.40 : x
  2. Step 2: Convert to fraction form
    21,002,547.40/31,456,581.90 = 12,499,491.40/x
  3. Step 3: Cross multiply
    21,002,547.40x = 31,456,581.90 × 12,499,491.40
  4. Step 4: Simplify right side
    21,002,547.40x = 393,191,274,932,445.62
  5. Step 5: Solve for x
    x = 393,191,274,932,445.62/21,002,547.40
  6. Step 6: Final answer
    x = 18,721,123.08

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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.