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Finding the Fourth Proportional to 13,829.80, 20,712.30 and 9,423.40

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Solution

The fourth proportional to 13,829.80, 20,712.30 and 9,423.40 is: 14,113.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,829.80 : 20,712.30 = 9,423.40 : x
  2. Step 2: Convert to fraction form
    13,829.80/20,712.30 = 9,423.40/x
  3. Step 3: Cross multiply
    13,829.80x = 20,712.30 × 9,423.40
  4. Step 4: Simplify right side
    13,829.80x = 195,180,287.82
  5. Step 5: Solve for x
    x = 195,180,287.82/13,829.80
  6. Step 6: Final answer
    x = 14,113.02

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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.