Home / 15,686.19-21,647.25-8,613

Finding the Fourth Proportional to 15,686.19, 21,647.25 and 8,613

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Solution

The fourth proportional to 15,686.19, 21,647.25 and 8,613 is: 11,886.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.19 : 21,647.25 = 8,613 : x
  2. Step 2: Convert to fraction form
    15,686.19/21,647.25 = 8,613/x
  3. Step 3: Cross multiply
    15,686.19x = 21,647.25 × 8,613
  4. Step 4: Simplify right side
    15,686.19x = 186,447,764.25
  5. Step 5: Solve for x
    x = 186,447,764.25/15,686.19
  6. Step 6: Final answer
    x = 11,886.11

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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.