Home / 8,515.11-12,758.51-5,221.28

Finding the Fourth Proportional to 8,515.11, 12,758.51 and 5,221.28

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Solution

The fourth proportional to 8,515.11, 12,758.51 and 5,221.28 is: 7,823.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,515.11 : 12,758.51 = 5,221.28 : x
  2. Step 2: Convert to fraction form
    8,515.11/12,758.51 = 5,221.28/x
  3. Step 3: Cross multiply
    8,515.11x = 12,758.51 × 5,221.28
  4. Step 4: Simplify right side
    8,515.11x = 66,615,663.19
  5. Step 5: Solve for x
    x = 66,615,663.19/8,515.11
  6. Step 6: Final answer
    x = 7,823.23

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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.