Home / 27,868.61-38,458.63-15,121.79

Finding the Fourth Proportional to 27,868.61, 38,458.63 and 15,121.79

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Solution

The fourth proportional to 27,868.61, 38,458.63 and 15,121.79 is: 20,868.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,868.61 : 38,458.63 = 15,121.79 : x
  2. Step 2: Convert to fraction form
    27,868.61/38,458.63 = 15,121.79/x
  3. Step 3: Cross multiply
    27,868.61x = 38,458.63 × 15,121.79
  4. Step 4: Simplify right side
    27,868.61x = 581,563,326.55
  5. Step 5: Solve for x
    x = 581,563,326.55/27,868.61
  6. Step 6: Final answer
    x = 20,868.04

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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.