Home / 12,818.16-17,690.29-7,781.23

Finding the Fourth Proportional to 12,818.16, 17,690.29 and 7,781.23

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Solution

The fourth proportional to 12,818.16, 17,690.29 and 7,781.23 is: 10,738.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,818.16 : 17,690.29 = 7,781.23 : x
  2. Step 2: Convert to fraction form
    12,818.16/17,690.29 = 7,781.23/x
  3. Step 3: Cross multiply
    12,818.16x = 17,690.29 × 7,781.23
  4. Step 4: Simplify right side
    12,818.16x = 137,652,217.92
  5. Step 5: Solve for x
    x = 137,652,217.92/12,818.16
  6. Step 6: Final answer
    x = 10,738.84

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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.