Home / 31,860.40-47,724.90-18,672.80

Finding the Fourth Proportional to 31,860.40, 47,724.90 and 18,672.80

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Solution

The fourth proportional to 31,860.40, 47,724.90 and 18,672.80 is: 27,970.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,860.40 : 47,724.90 = 18,672.80 : x
  2. Step 2: Convert to fraction form
    31,860.40/47,724.90 = 18,672.80/x
  3. Step 3: Cross multiply
    31,860.40x = 47,724.90 × 18,672.80
  4. Step 4: Simplify right side
    31,860.40x = 891,157,512.72
  5. Step 5: Solve for x
    x = 891,157,512.72/31,860.40
  6. Step 6: Final answer
    x = 27,970.69

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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.