Home / 21,180.24-31,785.35-8,711.64

Finding the Fourth Proportional to 21,180.24, 31,785.35 and 8,711.64

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Solution

The fourth proportional to 21,180.24, 31,785.35 and 8,711.64 is: 13,073.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.24 : 31,785.35 = 8,711.64 : x
  2. Step 2: Convert to fraction form
    21,180.24/31,785.35 = 8,711.64/x
  3. Step 3: Cross multiply
    21,180.24x = 31,785.35 × 8,711.64
  4. Step 4: Simplify right side
    21,180.24x = 276,902,482.92
  5. Step 5: Solve for x
    x = 276,902,482.92/21,180.24
  6. Step 6: Final answer
    x = 13,073.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.