Home / 31,521.20-43,517.05-20,925.32

Finding the Fourth Proportional to 31,521.20, 43,517.05 and 20,925.32

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Solution

The fourth proportional to 31,521.20, 43,517.05 and 20,925.32 is: 28,888.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,521.20 : 43,517.05 = 20,925.32 : x
  2. Step 2: Convert to fraction form
    31,521.20/43,517.05 = 20,925.32/x
  3. Step 3: Cross multiply
    31,521.20x = 43,517.05 × 20,925.32
  4. Step 4: Simplify right side
    31,521.20x = 910,607,926.81
  5. Step 5: Solve for x
    x = 910,607,926.81/31,521.20
  6. Step 6: Final answer
    x = 28,888.75

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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.