Home / 13,385.62-18,470.66-7,415.80

Finding the Fourth Proportional to 13,385.62, 18,470.66 and 7,415.80

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Solution

The fourth proportional to 13,385.62, 18,470.66 and 7,415.80 is: 10,232.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,385.62 : 18,470.66 = 7,415.80 : x
  2. Step 2: Convert to fraction form
    13,385.62/18,470.66 = 7,415.80/x
  3. Step 3: Cross multiply
    13,385.62x = 18,470.66 × 7,415.80
  4. Step 4: Simplify right side
    13,385.62x = 136,974,720.43
  5. Step 5: Solve for x
    x = 136,974,720.43/13,385.62
  6. Step 6: Final answer
    x = 10,232.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.