Home / 21,119.71-31,686.60-7,081.12

Finding the Fourth Proportional to 21,119.71, 31,686.60 and 7,081.12

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Solution

The fourth proportional to 21,119.71, 31,686.60 and 7,081.12 is: 10,624.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,119.71 : 31,686.60 = 7,081.12 : x
  2. Step 2: Convert to fraction form
    21,119.71/31,686.60 = 7,081.12/x
  3. Step 3: Cross multiply
    21,119.71x = 31,686.60 × 7,081.12
  4. Step 4: Simplify right side
    21,119.71x = 224,376,616.99
  5. Step 5: Solve for x
    x = 224,376,616.99/21,119.71
  6. Step 6: Final answer
    x = 10,624.04

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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.