Home / 12,360.80-18,512.40-9,423.20

Finding the Fourth Proportional to 12,360.80, 18,512.40 and 9,423.20

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Solution

The fourth proportional to 12,360.80, 18,512.40 and 9,423.20 is: 14,112.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,360.80 : 18,512.40 = 9,423.20 : x
  2. Step 2: Convert to fraction form
    12,360.80/18,512.40 = 9,423.20/x
  3. Step 3: Cross multiply
    12,360.80x = 18,512.40 × 9,423.20
  4. Step 4: Simplify right side
    12,360.80x = 174,446,047.68
  5. Step 5: Solve for x
    x = 174,446,047.68/12,360.80
  6. Step 6: Final answer
    x = 14,112.84

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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.