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Finding the Fourth Proportional to 15,827.60, 21,841.20 and 8,753.60

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Solution

The fourth proportional to 15,827.60, 21,841.20 and 8,753.60 is: 12,079.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,827.60 : 21,841.20 = 8,753.60 : x
  2. Step 2: Convert to fraction form
    15,827.60/21,841.20 = 8,753.60/x
  3. Step 3: Cross multiply
    15,827.60x = 21,841.20 × 8,753.60
  4. Step 4: Simplify right side
    15,827.60x = 191,189,128.32
  5. Step 5: Solve for x
    x = 191,189,128.32/15,827.60
  6. Step 6: Final answer
    x = 12,079.48

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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.