Home / 20,824.61-28,747.46-13,281.29

Finding the Fourth Proportional to 20,824.61, 28,747.46 and 13,281.29

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Solution

The fourth proportional to 20,824.61, 28,747.46 and 13,281.29 is: 18,334.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,824.61 : 28,747.46 = 13,281.29 : x
  2. Step 2: Convert to fraction form
    20,824.61/28,747.46 = 13,281.29/x
  3. Step 3: Cross multiply
    20,824.61x = 28,747.46 × 13,281.29
  4. Step 4: Simplify right side
    20,824.61x = 381,803,142.88
  5. Step 5: Solve for x
    x = 381,803,142.88/20,824.61
  6. Step 6: Final answer
    x = 18,334.23

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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.