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Finding the Fourth Proportional to 13,561.70, 20,342.55 and 11,374.70

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Solution

The fourth proportional to 13,561.70, 20,342.55 and 11,374.70 is: 17,062.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,561.70 : 20,342.55 = 11,374.70 : x
  2. Step 2: Convert to fraction form
    13,561.70/20,342.55 = 11,374.70/x
  3. Step 3: Cross multiply
    13,561.70x = 20,342.55 × 11,374.70
  4. Step 4: Simplify right side
    13,561.70x = 231,390,403.49
  5. Step 5: Solve for x
    x = 231,390,403.49/13,561.70
  6. Step 6: Final answer
    x = 17,062.05

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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.