Home / 8,643.28-12,969.95-3,645.34

Finding the Fourth Proportional to 8,643.28, 12,969.95 and 3,645.34

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Solution

The fourth proportional to 8,643.28, 12,969.95 and 3,645.34 is: 5,470.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,643.28 : 12,969.95 = 3,645.34 : x
  2. Step 2: Convert to fraction form
    8,643.28/12,969.95 = 3,645.34/x
  3. Step 3: Cross multiply
    8,643.28x = 12,969.95 × 3,645.34
  4. Step 4: Simplify right side
    8,643.28x = 47,279,877.53
  5. Step 5: Solve for x
    x = 47,279,877.53/8,643.28
  6. Step 6: Final answer
    x = 5,470.13

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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.