Home / 11,515.64-15,894.20-8,154.92

Finding the Fourth Proportional to 11,515.64, 15,894.20 and 8,154.92

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Solution

The fourth proportional to 11,515.64, 15,894.20 and 8,154.92 is: 11,255.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,515.64 : 15,894.20 = 8,154.92 : x
  2. Step 2: Convert to fraction form
    11,515.64/15,894.20 = 8,154.92/x
  3. Step 3: Cross multiply
    11,515.64x = 15,894.20 × 8,154.92
  4. Step 4: Simplify right side
    11,515.64x = 129,615,929.46
  5. Step 5: Solve for x
    x = 129,615,929.46/11,515.64
  6. Step 6: Final answer
    x = 11,255.64

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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.