Home / 15,783.46-21,781.30-8,613.43

Finding the Fourth Proportional to 15,783.46, 21,781.30 and 8,613.43

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Solution

The fourth proportional to 15,783.46, 21,781.30 and 8,613.43 is: 11,886.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,783.46 : 21,781.30 = 8,613.43 : x
  2. Step 2: Convert to fraction form
    15,783.46/21,781.30 = 8,613.43/x
  3. Step 3: Cross multiply
    15,783.46x = 21,781.30 × 8,613.43
  4. Step 4: Simplify right side
    15,783.46x = 187,611,610.72
  5. Step 5: Solve for x
    x = 187,611,610.72/15,783.46
  6. Step 6: Final answer
    x = 11,886.60

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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.