Home / 13,398.20-18,489.95-7,430.43

Finding the Fourth Proportional to 13,398.20, 18,489.95 and 7,430.43

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Solution

The fourth proportional to 13,398.20, 18,489.95 and 7,430.43 is: 10,254.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,398.20 : 18,489.95 = 7,430.43 : x
  2. Step 2: Convert to fraction form
    13,398.20/18,489.95 = 7,430.43/x
  3. Step 3: Cross multiply
    13,398.20x = 18,489.95 × 7,430.43
  4. Step 4: Simplify right side
    13,398.20x = 137,388,297.75
  5. Step 5: Solve for x
    x = 137,388,297.75/13,398.20
  6. Step 6: Final answer
    x = 10,254.23

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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.