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Finding the Fourth Proportional to 7,884,019.10, 11,826,028.65 and 7,128,191.90

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Solution

The fourth proportional to 7,884,019.10, 11,826,028.65 and 7,128,191.90 is: 10,692,287.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,884,019.10 : 11,826,028.65 = 7,128,191.90 : x
  2. Step 2: Convert to fraction form
    7,884,019.10/11,826,028.65 = 7,128,191.90/x
  3. Step 3: Cross multiply
    7,884,019.10x = 11,826,028.65 × 7,128,191.90
  4. Step 4: Simplify right side
    7,884,019.10x = 84,298,201,632,097.94
  5. Step 5: Solve for x
    x = 84,298,201,632,097.94/7,884,019.10
  6. Step 6: Final answer
    x = 10,692,287.85

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Similar ratio
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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.