Home / 12,237.60-18,356.40-8,781.60

Finding the Fourth Proportional to 12,237.60, 18,356.40 and 8,781.60

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Solution

The fourth proportional to 12,237.60, 18,356.40 and 8,781.60 is: 13,172.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,237.60 : 18,356.40 = 8,781.60 : x
  2. Step 2: Convert to fraction form
    12,237.60/18,356.40 = 8,781.60/x
  3. Step 3: Cross multiply
    12,237.60x = 18,356.40 × 8,781.60
  4. Step 4: Simplify right side
    12,237.60x = 161,198,562.24
  5. Step 5: Solve for x
    x = 161,198,562.24/12,237.60
  6. Step 6: Final answer
    x = 13,172.40

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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.