Home / 21,105,959.65-31,664,397.80-12,359,624.72

Finding the Fourth Proportional to 21,105,959.65, 31,664,397.80 and 12,359,624.72

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Solution

The fourth proportional to 21,105,959.65, 31,664,397.80 and 12,359,624.72 is: 18,542,633.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,105,959.65 : 31,664,397.80 = 12,359,624.72 : x
  2. Step 2: Convert to fraction form
    21,105,959.65/31,664,397.80 = 12,359,624.72/x
  3. Step 3: Cross multiply
    21,105,959.65x = 31,664,397.80 × 12,359,624.72
  4. Step 4: Simplify right side
    21,105,959.65x = 391,360,073,810,156.50
  5. Step 5: Solve for x
    x = 391,360,073,810,156.50/21,105,959.65
  6. Step 6: Final answer
    x = 18,542,633.47

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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.