Home / 15,857.32-21,878.13-9,142.04

Finding the Fourth Proportional to 15,857.32, 21,878.13 and 9,142.04

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Solution

The fourth proportional to 15,857.32, 21,878.13 and 9,142.04 is: 12,613.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,857.32 : 21,878.13 = 9,142.04 : x
  2. Step 2: Convert to fraction form
    15,857.32/21,878.13 = 9,142.04/x
  3. Step 3: Cross multiply
    15,857.32x = 21,878.13 × 9,142.04
  4. Step 4: Simplify right side
    15,857.32x = 200,010,630.19
  5. Step 5: Solve for x
    x = 200,010,630.19/15,857.32
  6. Step 6: Final answer
    x = 12,613.15

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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.