Home / 21,715.94-29,964.10-12,765.25

Finding the Fourth Proportional to 21,715.94, 29,964.10 and 12,765.25

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Solution

The fourth proportional to 21,715.94, 29,964.10 and 12,765.25 is: 17,613.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,715.94 : 29,964.10 = 12,765.25 : x
  2. Step 2: Convert to fraction form
    21,715.94/29,964.10 = 12,765.25/x
  3. Step 3: Cross multiply
    21,715.94x = 29,964.10 × 12,765.25
  4. Step 4: Simplify right side
    21,715.94x = 382,499,227.53
  5. Step 5: Solve for x
    x = 382,499,227.53/21,715.94
  6. Step 6: Final answer
    x = 17,613.75

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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.