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Finding the Fourth Proportional to 5,761.40, 8,642.10 and 1,866.20

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Solution

The fourth proportional to 5,761.40, 8,642.10 and 1,866.20 is: 2,799.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,761.40 : 8,642.10 = 1,866.20 : x
  2. Step 2: Convert to fraction form
    5,761.40/8,642.10 = 1,866.20/x
  3. Step 3: Cross multiply
    5,761.40x = 8,642.10 × 1,866.20
  4. Step 4: Simplify right side
    5,761.40x = 16,127,887.02
  5. Step 5: Solve for x
    x = 16,127,887.02/5,761.40
  6. Step 6: Final answer
    x = 2,799.30

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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.