Home / 25,478.27-38,045.84-20,807.55

Finding the Fourth Proportional to 25,478.27, 38,045.84 and 20,807.55

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Solution

The fourth proportional to 25,478.27, 38,045.84 and 20,807.55 is: 31,071.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,478.27 : 38,045.84 = 20,807.55 : x
  2. Step 2: Convert to fraction form
    25,478.27/38,045.84 = 20,807.55/x
  3. Step 3: Cross multiply
    25,478.27x = 38,045.84 × 20,807.55
  4. Step 4: Simplify right side
    25,478.27x = 791,640,614.05
  5. Step 5: Solve for x
    x = 791,640,614.05/25,478.27
  6. Step 6: Final answer
    x = 31,071.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.