Home / 15,661.38-21,612.78-8,587.68

Finding the Fourth Proportional to 15,661.38, 21,612.78 and 8,587.68

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Solution

The fourth proportional to 15,661.38, 21,612.78 and 8,587.68 is: 11,851.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,661.38 : 21,612.78 = 8,587.68 : x
  2. Step 2: Convert to fraction form
    15,661.38/21,612.78 = 8,587.68/x
  3. Step 3: Cross multiply
    15,661.38x = 21,612.78 × 8,587.68
  4. Step 4: Simplify right side
    15,661.38x = 185,603,638.55
  5. Step 5: Solve for x
    x = 185,603,638.55/15,661.38
  6. Step 6: Final answer
    x = 11,851.04

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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.