Home / 20,917.58-31,361.18-9,818.55

Finding the Fourth Proportional to 20,917.58, 31,361.18 and 9,818.55

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Solution

The fourth proportional to 20,917.58, 31,361.18 and 9,818.55 is: 14,720.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.58 : 31,361.18 = 9,818.55 : x
  2. Step 2: Convert to fraction form
    20,917.58/31,361.18 = 9,818.55/x
  3. Step 3: Cross multiply
    20,917.58x = 31,361.18 × 9,818.55
  4. Step 4: Simplify right side
    20,917.58x = 307,921,264.80
  5. Step 5: Solve for x
    x = 307,921,264.80/20,917.58
  6. Step 6: Final answer
    x = 14,720.70

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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.