Home / 12,877.81-17,767.21-7,211.71

Finding the Fourth Proportional to 12,877.81, 17,767.21 and 7,211.71

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Solution

The fourth proportional to 12,877.81, 17,767.21 and 7,211.71 is: 9,949.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,877.81 : 17,767.21 = 7,211.71 : x
  2. Step 2: Convert to fraction form
    12,877.81/17,767.21 = 7,211.71/x
  3. Step 3: Cross multiply
    12,877.81x = 17,767.21 × 7,211.71
  4. Step 4: Simplify right side
    12,877.81x = 128,131,966.03
  5. Step 5: Solve for x
    x = 128,131,966.03/12,877.81
  6. Step 6: Final answer
    x = 9,949.83

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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.