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Finding the Fourth Proportional to 14,020.80, 20,317.20 and 14,020.80

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Solution

The fourth proportional to 14,020.80, 20,317.20 and 14,020.80 is: 20,317.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,020.80 : 20,317.20 = 14,020.80 : x
  2. Step 2: Convert to fraction form
    14,020.80/20,317.20 = 14,020.80/x
  3. Step 3: Cross multiply
    14,020.80x = 20,317.20 × 14,020.80
  4. Step 4: Simplify right side
    14,020.80x = 284,863,397.76
  5. Step 5: Solve for x
    x = 284,863,397.76/14,020.80
  6. Step 6: Final answer
    x = 20,317.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.