Home / 13,398.64-18,489.49-7,430.18

Finding the Fourth Proportional to 13,398.64, 18,489.49 and 7,430.18

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Solution

The fourth proportional to 13,398.64, 18,489.49 and 7,430.18 is: 10,253.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,398.64 : 18,489.49 = 7,430.18 : x
  2. Step 2: Convert to fraction form
    13,398.64/18,489.49 = 7,430.18/x
  3. Step 3: Cross multiply
    13,398.64x = 18,489.49 × 7,430.18
  4. Step 4: Simplify right side
    13,398.64x = 137,380,252.69
  5. Step 5: Solve for x
    x = 137,380,252.69/13,398.64
  6. Step 6: Final answer
    x = 10,253.30

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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.