Home / 15,521.08-21,419.46-8,447.88

Finding the Fourth Proportional to 15,521.08, 21,419.46 and 8,447.88

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Solution

The fourth proportional to 15,521.08, 21,419.46 and 8,447.88 is: 11,658.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,521.08 : 21,419.46 = 8,447.88 : x
  2. Step 2: Convert to fraction form
    15,521.08/21,419.46 = 8,447.88/x
  3. Step 3: Cross multiply
    15,521.08x = 21,419.46 × 8,447.88
  4. Step 4: Simplify right side
    15,521.08x = 180,949,027.74
  5. Step 5: Solve for x
    x = 180,949,027.74/15,521.08
  6. Step 6: Final answer
    x = 11,658.28

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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.