Home / 31,521.72-43,517.74-20,925.84

Finding the Fourth Proportional to 31,521.72, 43,517.74 and 20,925.84

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Solution

The fourth proportional to 31,521.72, 43,517.74 and 20,925.84 is: 28,889.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,521.72 : 43,517.74 = 20,925.84 : x
  2. Step 2: Convert to fraction form
    31,521.72/43,517.74 = 20,925.84/x
  3. Step 3: Cross multiply
    31,521.72x = 43,517.74 × 20,925.84
  4. Step 4: Simplify right side
    31,521.72x = 910,645,264.40
  5. Step 5: Solve for x
    x = 910,645,264.40/31,521.72
  6. Step 6: Final answer
    x = 28,889.45

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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.