Home / 15,317,689.78-21,139,243.50-8,791,267.06

Finding the Fourth Proportional to 15,317,689.78, 21,139,243.50 and 8,791,267.06

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Solution

The fourth proportional to 15,317,689.78, 21,139,243.50 and 8,791,267.06 is: 12,132,425.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,317,689.78 : 21,139,243.50 = 8,791,267.06 : x
  2. Step 2: Convert to fraction form
    15,317,689.78/21,139,243.50 = 8,791,267.06/x
  3. Step 3: Cross multiply
    15,317,689.78x = 21,139,243.50 × 8,791,267.06
  4. Step 4: Simplify right side
    15,317,689.78x = 185,840,735,054,869.12
  5. Step 5: Solve for x
    x = 185,840,735,054,869.12/15,317,689.78
  6. Step 6: Final answer
    x = 12,132,425.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.