Home / 31,826.80-47,740.20-18,672.40

Finding the Fourth Proportional to 31,826.80, 47,740.20 and 18,672.40

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Solution

The fourth proportional to 31,826.80, 47,740.20 and 18,672.40 is: 28,008.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,826.80 : 47,740.20 = 18,672.40 : x
  2. Step 2: Convert to fraction form
    31,826.80/47,740.20 = 18,672.40/x
  3. Step 3: Cross multiply
    31,826.80x = 47,740.20 × 18,672.40
  4. Step 4: Simplify right side
    31,826.80x = 891,424,110.48
  5. Step 5: Solve for x
    x = 891,424,110.48/31,826.80
  6. Step 6: Final answer
    x = 28,008.60

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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.