Home / 20,310.56-28,011.12-13,234.40

Finding the Fourth Proportional to 20,310.56, 28,011.12 and 13,234.40

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Solution

The fourth proportional to 20,310.56, 28,011.12 and 13,234.40 is: 18,252.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,310.56 : 28,011.12 = 13,234.40 : x
  2. Step 2: Convert to fraction form
    20,310.56/28,011.12 = 13,234.40/x
  3. Step 3: Cross multiply
    20,310.56x = 28,011.12 × 13,234.40
  4. Step 4: Simplify right side
    20,310.56x = 370,710,366.53
  5. Step 5: Solve for x
    x = 370,710,366.53/20,310.56
  6. Step 6: Final answer
    x = 18,252.10

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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.