Home / 25,931.12-35,785.38-15,320.72

Finding the Fourth Proportional to 25,931.12, 35,785.38 and 15,320.72

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Solution

The fourth proportional to 25,931.12, 35,785.38 and 15,320.72 is: 21,142.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,931.12 : 35,785.38 = 15,320.72 : x
  2. Step 2: Convert to fraction form
    25,931.12/35,785.38 = 15,320.72/x
  3. Step 3: Cross multiply
    25,931.12x = 35,785.38 × 15,320.72
  4. Step 4: Simplify right side
    25,931.12x = 548,257,608.15
  5. Step 5: Solve for x
    x = 548,257,608.15/25,931.12
  6. Step 6: Final answer
    x = 21,142.85

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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.