Home / 18,788,120.34-28,134,338.51-12,378,941.88

Finding the Fourth Proportional to 18,788,120.34, 28,134,338.51 and 12,378,941.88

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Solution

The fourth proportional to 18,788,120.34, 28,134,338.51 and 12,378,941.88 is: 18,536,891.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,788,120.34 : 28,134,338.51 = 12,378,941.88 : x
  2. Step 2: Convert to fraction form
    18,788,120.34/28,134,338.51 = 12,378,941.88/x
  3. Step 3: Cross multiply
    18,788,120.34x = 28,134,338.51 × 12,378,941.88
  4. Step 4: Simplify right side
    18,788,120.34x = 348,273,341,172,979.38
  5. Step 5: Solve for x
    x = 348,273,341,172,979.38/18,788,120.34
  6. Step 6: Final answer
    x = 18,536,891.13

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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.