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Finding the Fourth Proportional to 13,615.80, 20,423.70 and 10,335.30

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Solution

The fourth proportional to 13,615.80, 20,423.70 and 10,335.30 is: 15,502.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.80 : 20,423.70 = 10,335.30 : x
  2. Step 2: Convert to fraction form
    13,615.80/20,423.70 = 10,335.30/x
  3. Step 3: Cross multiply
    13,615.80x = 20,423.70 × 10,335.30
  4. Step 4: Simplify right side
    13,615.80x = 211,085,066.61
  5. Step 5: Solve for x
    x = 211,085,066.61/13,615.80
  6. Step 6: Final answer
    x = 15,502.95

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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.