Home / 5,387.85-8,081.76-1,690.10

Finding the Fourth Proportional to 5,387.85, 8,081.76 and 1,690.10

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Solution

The fourth proportional to 5,387.85, 8,081.76 and 1,690.10 is: 2,535.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,387.85 : 8,081.76 = 1,690.10 : x
  2. Step 2: Convert to fraction form
    5,387.85/8,081.76 = 1,690.10/x
  3. Step 3: Cross multiply
    5,387.85x = 8,081.76 × 1,690.10
  4. Step 4: Simplify right side
    5,387.85x = 13,658,982.58
  5. Step 5: Solve for x
    x = 13,658,982.58/5,387.85
  6. Step 6: Final answer
    x = 2,535.15

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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.