Home / 12,237.60-18,356.40-7,039.20

Finding the Fourth Proportional to 12,237.60, 18,356.40 and 7,039.20

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Solution

The fourth proportional to 12,237.60, 18,356.40 and 7,039.20 is: 10,558.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,237.60 : 18,356.40 = 7,039.20 : x
  2. Step 2: Convert to fraction form
    12,237.60/18,356.40 = 7,039.20/x
  3. Step 3: Cross multiply
    12,237.60x = 18,356.40 × 7,039.20
  4. Step 4: Simplify right side
    12,237.60x = 129,214,370.88
  5. Step 5: Solve for x
    x = 129,214,370.88/12,237.60
  6. Step 6: Final answer
    x = 10,558.80

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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.