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Finding the Fourth Proportional to 15,580.44, 21,500.88 and 8,506.86

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Solution

The fourth proportional to 15,580.44, 21,500.88 and 8,506.86 is: 11,739.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,580.44 : 21,500.88 = 8,506.86 : x
  2. Step 2: Convert to fraction form
    15,580.44/21,500.88 = 8,506.86/x
  3. Step 3: Cross multiply
    15,580.44x = 21,500.88 × 8,506.86
  4. Step 4: Simplify right side
    15,580.44x = 182,904,976.04
  5. Step 5: Solve for x
    x = 182,904,976.04/15,580.44
  6. Step 6: Final answer
    x = 11,739.40

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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.