Home / 18,785,157.12-28,158,071.13-7,861,605.72

Finding the Fourth Proportional to 18,785,157.12, 28,158,071.13 and 7,861,605.72

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Solution

The fourth proportional to 18,785,157.12, 28,158,071.13 and 7,861,605.72 is: 11,784,178.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,785,157.12 : 28,158,071.13 = 7,861,605.72 : x
  2. Step 2: Convert to fraction form
    18,785,157.12/28,158,071.13 = 7,861,605.72/x
  3. Step 3: Cross multiply
    18,785,157.12x = 28,158,071.13 × 7,861,605.72
  4. Step 4: Simplify right side
    18,785,157.12x = 221,367,653,059,774.84
  5. Step 5: Solve for x
    x = 221,367,653,059,774.84/18,785,157.12
  6. Step 6: Final answer
    x = 11,784,178.95

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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.