Home / 13,398.85-18,490.46-7,431.07

Finding the Fourth Proportional to 13,398.85, 18,490.46 and 7,431.07

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Solution

The fourth proportional to 13,398.85, 18,490.46 and 7,431.07 is: 10,254.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,398.85 : 18,490.46 = 7,431.07 : x
  2. Step 2: Convert to fraction form
    13,398.85/18,490.46 = 7,431.07/x
  3. Step 3: Cross multiply
    13,398.85x = 18,490.46 × 7,431.07
  4. Step 4: Simplify right side
    13,398.85x = 137,403,902.59
  5. Step 5: Solve for x
    x = 137,403,902.59/13,398.85
  6. Step 6: Final answer
    x = 10,254.90

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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.