Home / 8,085.16-11,151.51-7,139.29

Finding the Fourth Proportional to 8,085.16, 11,151.51 and 7,139.29

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Solution

The fourth proportional to 8,085.16, 11,151.51 and 7,139.29 is: 9,846.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,085.16 : 11,151.51 = 7,139.29 : x
  2. Step 2: Convert to fraction form
    8,085.16/11,151.51 = 7,139.29/x
  3. Step 3: Cross multiply
    8,085.16x = 11,151.51 × 7,139.29
  4. Step 4: Simplify right side
    8,085.16x = 79,613,808.07
  5. Step 5: Solve for x
    x = 79,613,808.07/8,085.16
  6. Step 6: Final answer
    x = 9,846.90

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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.