Home / 11,434.20-15,779.12-6,398.88

Finding the Fourth Proportional to 11,434.20, 15,779.12 and 6,398.88

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Solution

The fourth proportional to 11,434.20, 15,779.12 and 6,398.88 is: 8,830.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,434.20 : 15,779.12 = 6,398.88 : x
  2. Step 2: Convert to fraction form
    11,434.20/15,779.12 = 6,398.88/x
  3. Step 3: Cross multiply
    11,434.20x = 15,779.12 × 6,398.88
  4. Step 4: Simplify right side
    11,434.20x = 100,968,695.39
  5. Step 5: Solve for x
    x = 100,968,695.39/11,434.20
  6. Step 6: Final answer
    x = 8,830.41

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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.