Home / 15,661.60-21,612.54-8,587.78

Finding the Fourth Proportional to 15,661.60, 21,612.54 and 8,587.78

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Solution

The fourth proportional to 15,661.60, 21,612.54 and 8,587.78 is: 11,850.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,661.60 : 21,612.54 = 8,587.78 : x
  2. Step 2: Convert to fraction form
    15,661.60/21,612.54 = 8,587.78/x
  3. Step 3: Cross multiply
    15,661.60x = 21,612.54 × 8,587.78
  4. Step 4: Simplify right side
    15,661.60x = 185,603,738.76
  5. Step 5: Solve for x
    x = 185,603,738.76/15,661.60
  6. Step 6: Final answer
    x = 11,850.88

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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.