Home / 13,416.12-18,515.07-7,447.89

Finding the Fourth Proportional to 13,416.12, 18,515.07 and 7,447.89

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Solution

The fourth proportional to 13,416.12, 18,515.07 and 7,447.89 is: 10,278.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,416.12 : 18,515.07 = 7,447.89 : x
  2. Step 2: Convert to fraction form
    13,416.12/18,515.07 = 7,447.89/x
  3. Step 3: Cross multiply
    13,416.12x = 18,515.07 × 7,447.89
  4. Step 4: Simplify right side
    13,416.12x = 137,898,204.70
  5. Step 5: Solve for x
    x = 137,898,204.70/13,416.12
  6. Step 6: Final answer
    x = 10,278.55

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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.