Home / 10,890.32-15,023.11-7,115.70

Finding the Fourth Proportional to 10,890.32, 15,023.11 and 7,115.70

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Solution

The fourth proportional to 10,890.32, 15,023.11 and 7,115.70 is: 9,816.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,890.32 : 15,023.11 = 7,115.70 : x
  2. Step 2: Convert to fraction form
    10,890.32/15,023.11 = 7,115.70/x
  3. Step 3: Cross multiply
    10,890.32x = 15,023.11 × 7,115.70
  4. Step 4: Simplify right side
    10,890.32x = 106,899,911.21
  5. Step 5: Solve for x
    x = 106,899,911.21/10,890.32
  6. Step 6: Final answer
    x = 9,816.05

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1.5x scale

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.