Home / 13,470.40-18,589.65-7,420.89

Finding the Fourth Proportional to 13,470.40, 18,589.65 and 7,420.89

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Solution

The fourth proportional to 13,470.40, 18,589.65 and 7,420.89 is: 10,241.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,470.40 : 18,589.65 = 7,420.89 : x
  2. Step 2: Convert to fraction form
    13,470.40/18,589.65 = 7,420.89/x
  3. Step 3: Cross multiply
    13,470.40x = 18,589.65 × 7,420.89
  4. Step 4: Simplify right side
    13,470.40x = 137,951,747.79
  5. Step 5: Solve for x
    x = 137,951,747.79/13,470.40
  6. Step 6: Final answer
    x = 10,241.10

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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.