Home / 10,955.20-15,115.92-6,479.08

Finding the Fourth Proportional to 10,955.20, 15,115.92 and 6,479.08

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Solution

The fourth proportional to 10,955.20, 15,115.92 and 6,479.08 is: 8,939.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,955.20 : 15,115.92 = 6,479.08 : x
  2. Step 2: Convert to fraction form
    10,955.20/15,115.92 = 6,479.08/x
  3. Step 3: Cross multiply
    10,955.20x = 15,115.92 × 6,479.08
  4. Step 4: Simplify right side
    10,955.20x = 97,937,254.95
  5. Step 5: Solve for x
    x = 97,937,254.95/10,955.20
  6. Step 6: Final answer
    x = 8,939.80

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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.