Home / 15,228.47-21,028.20-12,723.95

Finding the Fourth Proportional to 15,228.47, 21,028.20 and 12,723.95

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Solution

The fourth proportional to 15,228.47, 21,028.20 and 12,723.95 is: 17,569.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,228.47 : 21,028.20 = 12,723.95 : x
  2. Step 2: Convert to fraction form
    15,228.47/21,028.20 = 12,723.95/x
  3. Step 3: Cross multiply
    15,228.47x = 21,028.20 × 12,723.95
  4. Step 4: Simplify right side
    15,228.47x = 267,561,765.39
  5. Step 5: Solve for x
    x = 267,561,765.39/15,228.47
  6. Step 6: Final answer
    x = 17,569.84

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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.