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Finding the Fourth Proportional to 13,868.08, 20,812.91 and 9,680.90

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Solution

The fourth proportional to 13,868.08, 20,812.91 and 9,680.90 is: 14,528.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,868.08 : 20,812.91 = 9,680.90 : x
  2. Step 2: Convert to fraction form
    13,868.08/20,812.91 = 9,680.90/x
  3. Step 3: Cross multiply
    13,868.08x = 20,812.91 × 9,680.90
  4. Step 4: Simplify right side
    13,868.08x = 201,487,547.95
  5. Step 5: Solve for x
    x = 201,487,547.95/13,868.08
  6. Step 6: Final answer
    x = 14,528.87

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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.