Home / 15,686.85-21,647.76-8,613.12

Finding the Fourth Proportional to 15,686.85, 21,647.76 and 8,613.12

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Solution

The fourth proportional to 15,686.85, 21,647.76 and 8,613.12 is: 11,886.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.85 : 21,647.76 = 8,613.12 : x
  2. Step 2: Convert to fraction form
    15,686.85/21,647.76 = 8,613.12/x
  3. Step 3: Cross multiply
    15,686.85x = 21,647.76 × 8,613.12
  4. Step 4: Simplify right side
    15,686.85x = 186,454,754.61
  5. Step 5: Solve for x
    x = 186,454,754.61/15,686.85
  6. Step 6: Final answer
    x = 11,886.05

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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.