Home / 10,931.12-15,081.72-6,455.24

Finding the Fourth Proportional to 10,931.12, 15,081.72 and 6,455.24

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Solution

The fourth proportional to 10,931.12, 15,081.72 and 6,455.24 is: 8,906.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,931.12 : 15,081.72 = 6,455.24 : x
  2. Step 2: Convert to fraction form
    10,931.12/15,081.72 = 6,455.24/x
  3. Step 3: Cross multiply
    10,931.12x = 15,081.72 × 6,455.24
  4. Step 4: Simplify right side
    10,931.12x = 97,356,122.21
  5. Step 5: Solve for x
    x = 97,356,122.21/10,931.12
  6. Step 6: Final answer
    x = 8,906.33

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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.