Home / 12,821.80-17,680.13-8,337.23

Finding the Fourth Proportional to 12,821.80, 17,680.13 and 8,337.23

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Solution

The fourth proportional to 12,821.80, 17,680.13 and 8,337.23 is: 11,496.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,821.80 : 17,680.13 = 8,337.23 : x
  2. Step 2: Convert to fraction form
    12,821.80/17,680.13 = 8,337.23/x
  3. Step 3: Cross multiply
    12,821.80x = 17,680.13 × 8,337.23
  4. Step 4: Simplify right side
    12,821.80x = 147,403,268.55
  5. Step 5: Solve for x
    x = 147,403,268.55/12,821.80
  6. Step 6: Final answer
    x = 11,496.31

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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.