Home / 13,612.24-20,417.88-4,378

Finding the Fourth Proportional to 13,612.24, 20,417.88 and 4,378

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Solution

The fourth proportional to 13,612.24, 20,417.88 and 4,378 is: 6,566.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.24 : 20,417.88 = 4,378 : x
  2. Step 2: Convert to fraction form
    13,612.24/20,417.88 = 4,378/x
  3. Step 3: Cross multiply
    13,612.24x = 20,417.88 × 4,378
  4. Step 4: Simplify right side
    13,612.24x = 89,389,478.64
  5. Step 5: Solve for x
    x = 89,389,478.64/13,612.24
  6. Step 6: Final answer
    x = 6,566.85

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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.