Home / 21,176.11-31,767.09-7,140.15

Finding the Fourth Proportional to 21,176.11, 31,767.09 and 7,140.15

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Solution

The fourth proportional to 21,176.11, 31,767.09 and 7,140.15 is: 10,711.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,176.11 : 31,767.09 = 7,140.15 : x
  2. Step 2: Convert to fraction form
    21,176.11/31,767.09 = 7,140.15/x
  3. Step 3: Cross multiply
    21,176.11x = 31,767.09 × 7,140.15
  4. Step 4: Simplify right side
    21,176.11x = 226,821,641.76
  5. Step 5: Solve for x
    x = 226,821,641.76/21,176.11
  6. Step 6: Final answer
    x = 10,711.21

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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.