Home / 15,687.04-21,648.18-8,613.60

Finding the Fourth Proportional to 15,687.04, 21,648.18 and 8,613.60

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Solution

The fourth proportional to 15,687.04, 21,648.18 and 8,613.60 is: 11,886.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,687.04 : 21,648.18 = 8,613.60 : x
  2. Step 2: Convert to fraction form
    15,687.04/21,648.18 = 8,613.60/x
  3. Step 3: Cross multiply
    15,687.04x = 21,648.18 × 8,613.60
  4. Step 4: Simplify right side
    15,687.04x = 186,468,763.25
  5. Step 5: Solve for x
    x = 186,468,763.25/15,687.04
  6. Step 6: Final answer
    x = 11,886.80

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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.