Home / 15,921.30-21,965.79-9,549.95

Finding the Fourth Proportional to 15,921.30, 21,965.79 and 9,549.95

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Solution

The fourth proportional to 15,921.30, 21,965.79 and 9,549.95 is: 13,175.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,921.30 : 21,965.79 = 9,549.95 : x
  2. Step 2: Convert to fraction form
    15,921.30/21,965.79 = 9,549.95/x
  3. Step 3: Cross multiply
    15,921.30x = 21,965.79 × 9,549.95
  4. Step 4: Simplify right side
    15,921.30x = 209,772,196.21
  5. Step 5: Solve for x
    x = 209,772,196.21/15,921.30
  6. Step 6: Final answer
    x = 13,175.57

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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.