Home / 13,781.54-20,671.10-5,459.40

Finding the Fourth Proportional to 13,781.54, 20,671.10 and 5,459.40

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Solution

The fourth proportional to 13,781.54, 20,671.10 and 5,459.40 is: 8,188.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.54 : 20,671.10 = 5,459.40 : x
  2. Step 2: Convert to fraction form
    13,781.54/20,671.10 = 5,459.40/x
  3. Step 3: Cross multiply
    13,781.54x = 20,671.10 × 5,459.40
  4. Step 4: Simplify right side
    13,781.54x = 112,851,796.52
  5. Step 5: Solve for x
    x = 112,851,796.52/13,781.54
  6. Step 6: Final answer
    x = 8,188.62

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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.