Home / 13,384.15-18,470.25-7,415.90

Finding the Fourth Proportional to 13,384.15, 18,470.25 and 7,415.90

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Solution

The fourth proportional to 13,384.15, 18,470.25 and 7,415.90 is: 10,234.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,384.15 : 18,470.25 = 7,415.90 : x
  2. Step 2: Convert to fraction form
    13,384.15/18,470.25 = 7,415.90/x
  3. Step 3: Cross multiply
    13,384.15x = 18,470.25 × 7,415.90
  4. Step 4: Simplify right side
    13,384.15x = 136,973,434.62
  5. Step 5: Solve for x
    x = 136,973,434.62/13,384.15
  6. Step 6: Final answer
    x = 10,234.01

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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.