Home / 15,781.64-21,777.36-8,707.88

Finding the Fourth Proportional to 15,781.64, 21,777.36 and 8,707.88

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Solution

The fourth proportional to 15,781.64, 21,777.36 and 8,707.88 is: 12,016.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,781.64 : 21,777.36 = 8,707.88 : x
  2. Step 2: Convert to fraction form
    15,781.64/21,777.36 = 8,707.88/x
  3. Step 3: Cross multiply
    15,781.64x = 21,777.36 × 8,707.88
  4. Step 4: Simplify right side
    15,781.64x = 189,634,637.60
  5. Step 5: Solve for x
    x = 189,634,637.60/15,781.64
  6. Step 6: Final answer
    x = 12,016.16

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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.