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Finding the Fourth Proportional to 20,482.40, 30,723.58 and 11,711.16

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Solution

The fourth proportional to 20,482.40, 30,723.58 and 11,711.16 is: 17,566.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,482.40 : 30,723.58 = 11,711.16 : x
  2. Step 2: Convert to fraction form
    20,482.40/30,723.58 = 11,711.16/x
  3. Step 3: Cross multiply
    20,482.40x = 30,723.58 × 11,711.16
  4. Step 4: Simplify right side
    20,482.40x = 359,808,761.15
  5. Step 5: Solve for x
    x = 359,808,761.15/20,482.40
  6. Step 6: Final answer
    x = 17,566.73

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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.