Home / 15,713.30-21,684.77-8,639.91

Finding the Fourth Proportional to 15,713.30, 21,684.77 and 8,639.91

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Solution

The fourth proportional to 15,713.30, 21,684.77 and 8,639.91 is: 11,923.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,713.30 : 21,684.77 = 8,639.91 : x
  2. Step 2: Convert to fraction form
    15,713.30/21,684.77 = 8,639.91/x
  3. Step 3: Cross multiply
    15,713.30x = 21,684.77 × 8,639.91
  4. Step 4: Simplify right side
    15,713.30x = 187,354,417.97
  5. Step 5: Solve for x
    x = 187,354,417.97/15,713.30
  6. Step 6: Final answer
    x = 11,923.31

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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.