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Finding the Fourth Proportional to 14,555.25, 20,085.30 and 8,585.55

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Solution

The fourth proportional to 14,555.25, 20,085.30 and 8,585.55 is: 11,847.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,555.25 : 20,085.30 = 8,585.55 : x
  2. Step 2: Convert to fraction form
    14,555.25/20,085.30 = 8,585.55/x
  3. Step 3: Cross multiply
    14,555.25x = 20,085.30 × 8,585.55
  4. Step 4: Simplify right side
    14,555.25x = 172,443,347.42
  5. Step 5: Solve for x
    x = 172,443,347.42/14,555.25
  6. Step 6: Final answer
    x = 11,847.50

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Double scale
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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.