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Finding the Fourth Proportional to 13,412.40, 20,118.60 and 11,565.60

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Solution

The fourth proportional to 13,412.40, 20,118.60 and 11,565.60 is: 17,348.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,412.40 : 20,118.60 = 11,565.60 : x
  2. Step 2: Convert to fraction form
    13,412.40/20,118.60 = 11,565.60/x
  3. Step 3: Cross multiply
    13,412.40x = 20,118.60 × 11,565.60
  4. Step 4: Simplify right side
    13,412.40x = 232,683,680.16
  5. Step 5: Solve for x
    x = 232,683,680.16/13,412.40
  6. Step 6: Final answer
    x = 17,348.40

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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.