Home / 4,128.12-6,191.10-1,531.80

Finding the Fourth Proportional to 4,128.12, 6,191.10 and 1,531.80

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Solution

The fourth proportional to 4,128.12, 6,191.10 and 1,531.80 is: 2,297.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,128.12 : 6,191.10 = 1,531.80 : x
  2. Step 2: Convert to fraction form
    4,128.12/6,191.10 = 1,531.80/x
  3. Step 3: Cross multiply
    4,128.12x = 6,191.10 × 1,531.80
  4. Step 4: Simplify right side
    4,128.12x = 9,483,526.98
  5. Step 5: Solve for x
    x = 9,483,526.98/4,128.12
  6. Step 6: Final answer
    x = 2,297.30

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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.