Home / 15,919.70-21,963.22-9,867.18

Finding the Fourth Proportional to 15,919.70, 21,963.22 and 9,867.18

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Solution

The fourth proportional to 15,919.70, 21,963.22 and 9,867.18 is: 13,613.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,919.70 : 21,963.22 = 9,867.18 : x
  2. Step 2: Convert to fraction form
    15,919.70/21,963.22 = 9,867.18/x
  3. Step 3: Cross multiply
    15,919.70x = 21,963.22 × 9,867.18
  4. Step 4: Simplify right side
    15,919.70x = 216,715,045.12
  5. Step 5: Solve for x
    x = 216,715,045.12/15,919.70
  6. Step 6: Final answer
    x = 13,613.01

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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.