Home / 5,105.20-7,657.80-1,818.40

Finding the Fourth Proportional to 5,105.20, 7,657.80 and 1,818.40

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Solution

The fourth proportional to 5,105.20, 7,657.80 and 1,818.40 is: 2,727.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,105.20 : 7,657.80 = 1,818.40 : x
  2. Step 2: Convert to fraction form
    5,105.20/7,657.80 = 1,818.40/x
  3. Step 3: Cross multiply
    5,105.20x = 7,657.80 × 1,818.40
  4. Step 4: Simplify right side
    5,105.20x = 13,924,943.52
  5. Step 5: Solve for x
    x = 13,924,943.52/5,105.20
  6. Step 6: Final answer
    x = 2,727.60

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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.