Home / 13,401.10-18,490.80-7,431.40

Finding the Fourth Proportional to 13,401.10, 18,490.80 and 7,431.40

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Solution

The fourth proportional to 13,401.10, 18,490.80 and 7,431.40 is: 10,253.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,401.10 : 18,490.80 = 7,431.40 : x
  2. Step 2: Convert to fraction form
    13,401.10/18,490.80 = 7,431.40/x
  3. Step 3: Cross multiply
    13,401.10x = 18,490.80 × 7,431.40
  4. Step 4: Simplify right side
    13,401.10x = 137,412,531.12
  5. Step 5: Solve for x
    x = 137,412,531.12/13,401.10
  6. Step 6: Final answer
    x = 10,253.82

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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.