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Finding the Fourth Proportional to 15,211.80, 20,983.86 and 9,626.04

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Solution

The fourth proportional to 15,211.80, 20,983.86 and 9,626.04 is: 13,278.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,211.80 : 20,983.86 = 9,626.04 : x
  2. Step 2: Convert to fraction form
    15,211.80/20,983.86 = 9,626.04/x
  3. Step 3: Cross multiply
    15,211.80x = 20,983.86 × 9,626.04
  4. Step 4: Simplify right side
    15,211.80x = 201,991,475.71
  5. Step 5: Solve for x
    x = 201,991,475.71/15,211.80
  6. Step 6: Final answer
    x = 13,278.60

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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.