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Finding the Fourth Proportional to 13,411.60, 20,117.41 and 7,152.65

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Solution

The fourth proportional to 13,411.60, 20,117.41 and 7,152.65 is: 10,728.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,411.60 : 20,117.41 = 7,152.65 : x
  2. Step 2: Convert to fraction form
    13,411.60/20,117.41 = 7,152.65/x
  3. Step 3: Cross multiply
    13,411.60x = 20,117.41 × 7,152.65
  4. Step 4: Simplify right side
    13,411.60x = 143,892,832.31
  5. Step 5: Solve for x
    x = 143,892,832.31/13,411.60
  6. Step 6: Final answer
    x = 10,728.98

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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.