Home / 11,920.64-16,451.10-6,615.47

Finding the Fourth Proportional to 11,920.64, 16,451.10 and 6,615.47

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Solution

The fourth proportional to 11,920.64, 16,451.10 and 6,615.47 is: 9,129.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,920.64 : 16,451.10 = 6,615.47 : x
  2. Step 2: Convert to fraction form
    11,920.64/16,451.10 = 6,615.47/x
  3. Step 3: Cross multiply
    11,920.64x = 16,451.10 × 6,615.47
  4. Step 4: Simplify right side
    11,920.64x = 108,831,799.64
  5. Step 5: Solve for x
    x = 108,831,799.64/11,920.64
  6. Step 6: Final answer
    x = 9,129.70

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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.