Home / 5,165.40-7,129.28-3,069.12

Finding the Fourth Proportional to 5,165.40, 7,129.28 and 3,069.12

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Solution

The fourth proportional to 5,165.40, 7,129.28 and 3,069.12 is: 4,236.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,165.40 : 7,129.28 = 3,069.12 : x
  2. Step 2: Convert to fraction form
    5,165.40/7,129.28 = 3,069.12/x
  3. Step 3: Cross multiply
    5,165.40x = 7,129.28 × 3,069.12
  4. Step 4: Simplify right side
    5,165.40x = 21,880,615.83
  5. Step 5: Solve for x
    x = 21,880,615.83/5,165.40
  6. Step 6: Final answer
    x = 4,236.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.