Home / 13,329.20-19,993.80-12,612.40

Finding the Fourth Proportional to 13,329.20, 19,993.80 and 12,612.40

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Solution

The fourth proportional to 13,329.20, 19,993.80 and 12,612.40 is: 18,918.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,329.20 : 19,993.80 = 12,612.40 : x
  2. Step 2: Convert to fraction form
    13,329.20/19,993.80 = 12,612.40/x
  3. Step 3: Cross multiply
    13,329.20x = 19,993.80 × 12,612.40
  4. Step 4: Simplify right side
    13,329.20x = 252,169,803.12
  5. Step 5: Solve for x
    x = 252,169,803.12/13,329.20
  6. Step 6: Final answer
    x = 18,918.60

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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.