Home / 15,686.13-21,645.45-8,612.40

Finding the Fourth Proportional to 15,686.13, 21,645.45 and 8,612.40

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Solution

The fourth proportional to 15,686.13, 21,645.45 and 8,612.40 is: 11,884.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.13 : 21,645.45 = 8,612.40 : x
  2. Step 2: Convert to fraction form
    15,686.13/21,645.45 = 8,612.40/x
  3. Step 3: Cross multiply
    15,686.13x = 21,645.45 × 8,612.40
  4. Step 4: Simplify right side
    15,686.13x = 186,419,273.58
  5. Step 5: Solve for x
    x = 186,419,273.58/15,686.13
  6. Step 6: Final answer
    x = 11,884.34

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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.