Home / 20,781.66-28,656.01-14,055.61

Finding the Fourth Proportional to 20,781.66, 28,656.01 and 14,055.61

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Solution

The fourth proportional to 20,781.66, 28,656.01 and 14,055.61 is: 19,381.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.66 : 28,656.01 = 14,055.61 : x
  2. Step 2: Convert to fraction form
    20,781.66/28,656.01 = 14,055.61/x
  3. Step 3: Cross multiply
    20,781.66x = 28,656.01 × 14,055.61
  4. Step 4: Simplify right side
    20,781.66x = 402,777,630.44
  5. Step 5: Solve for x
    x = 402,777,630.44/20,781.66
  6. Step 6: Final answer
    x = 19,381.40

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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.