Home / 13,376.20-18,459.15-7,407.89

Finding the Fourth Proportional to 13,376.20, 18,459.15 and 7,407.89

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Solution

The fourth proportional to 13,376.20, 18,459.15 and 7,407.89 is: 10,222.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,376.20 : 18,459.15 = 7,407.89 : x
  2. Step 2: Convert to fraction form
    13,376.20/18,459.15 = 7,407.89/x
  3. Step 3: Cross multiply
    13,376.20x = 18,459.15 × 7,407.89
  4. Step 4: Simplify right side
    13,376.20x = 136,743,431.80
  5. Step 5: Solve for x
    x = 136,743,431.80/13,376.20
  6. Step 6: Final answer
    x = 10,222.89

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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.