Home / 13,470.55-18,589.10-9,221.51

Finding the Fourth Proportional to 13,470.55, 18,589.10 and 9,221.51

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Solution

The fourth proportional to 13,470.55, 18,589.10 and 9,221.51 is: 12,725.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,470.55 : 18,589.10 = 9,221.51 : x
  2. Step 2: Convert to fraction form
    13,470.55/18,589.10 = 9,221.51/x
  3. Step 3: Cross multiply
    13,470.55x = 18,589.10 × 9,221.51
  4. Step 4: Simplify right side
    13,470.55x = 171,419,551.84
  5. Step 5: Solve for x
    x = 171,419,551.84/13,470.55
  6. Step 6: Final answer
    x = 12,725.50

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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.