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Finding the Fourth Proportional to 12,561.60, 17,328.96 and 7,524.48

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Solution

The fourth proportional to 12,561.60, 17,328.96 and 7,524.48 is: 10,380.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,561.60 : 17,328.96 = 7,524.48 : x
  2. Step 2: Convert to fraction form
    12,561.60/17,328.96 = 7,524.48/x
  3. Step 3: Cross multiply
    12,561.60x = 17,328.96 × 7,524.48
  4. Step 4: Simplify right side
    12,561.60x = 130,391,412.94
  5. Step 5: Solve for x
    x = 130,391,412.94/12,561.60
  6. Step 6: Final answer
    x = 10,380.16

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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.