Home / 31,377.60-47,066.40-18,911.70

Finding the Fourth Proportional to 31,377.60, 47,066.40 and 18,911.70

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Solution

The fourth proportional to 31,377.60, 47,066.40 and 18,911.70 is: 28,367.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,377.60 : 47,066.40 = 18,911.70 : x
  2. Step 2: Convert to fraction form
    31,377.60/47,066.40 = 18,911.70/x
  3. Step 3: Cross multiply
    31,377.60x = 47,066.40 × 18,911.70
  4. Step 4: Simplify right side
    31,377.60x = 890,105,636.88
  5. Step 5: Solve for x
    x = 890,105,636.88/31,377.60
  6. Step 6: Final answer
    x = 28,367.55

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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.