Home / 12,381.68-18,587.40-9,786.80

Finding the Fourth Proportional to 12,381.68, 18,587.40 and 9,786.80

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Solution

The fourth proportional to 12,381.68, 18,587.40 and 9,786.80 is: 14,691.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,381.68 : 18,587.40 = 9,786.80 : x
  2. Step 2: Convert to fraction form
    12,381.68/18,587.40 = 9,786.80/x
  3. Step 3: Cross multiply
    12,381.68x = 18,587.40 × 9,786.80
  4. Step 4: Simplify right side
    12,381.68x = 181,911,166.32
  5. Step 5: Solve for x
    x = 181,911,166.32/12,381.68
  6. Step 6: Final answer
    x = 14,691.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.