Home / 15,686.19-21,646.68-8,612.56

Finding the Fourth Proportional to 15,686.19, 21,646.68 and 8,612.56

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Solution

The fourth proportional to 15,686.19, 21,646.68 and 8,612.56 is: 11,885.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.19 : 21,646.68 = 8,612.56 : x
  2. Step 2: Convert to fraction form
    15,686.19/21,646.68 = 8,612.56/x
  3. Step 3: Cross multiply
    15,686.19x = 21,646.68 × 8,612.56
  4. Step 4: Simplify right side
    15,686.19x = 186,433,330.30
  5. Step 5: Solve for x
    x = 186,433,330.30/15,686.19
  6. Step 6: Final answer
    x = 11,885.19

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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.