Home / 15,661.30-21,612.48-8,587.60

Finding the Fourth Proportional to 15,661.30, 21,612.48 and 8,587.60

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Solution

The fourth proportional to 15,661.30, 21,612.48 and 8,587.60 is: 11,850.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,661.30 : 21,612.48 = 8,587.60 : x
  2. Step 2: Convert to fraction form
    15,661.30/21,612.48 = 8,587.60/x
  3. Step 3: Cross multiply
    15,661.30x = 21,612.48 × 8,587.60
  4. Step 4: Simplify right side
    15,661.30x = 185,599,333.25
  5. Step 5: Solve for x
    x = 185,599,333.25/15,661.30
  6. Step 6: Final answer
    x = 11,850.83

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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.