Home / 13,398.79-18,489.12-7,430.44

Finding the Fourth Proportional to 13,398.79, 18,489.12 and 7,430.44

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Solution

The fourth proportional to 13,398.79, 18,489.12 and 7,430.44 is: 10,253.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,398.79 : 18,489.12 = 7,430.44 : x
  2. Step 2: Convert to fraction form
    13,398.79/18,489.12 = 7,430.44/x
  3. Step 3: Cross multiply
    13,398.79x = 18,489.12 × 7,430.44
  4. Step 4: Simplify right side
    13,398.79x = 137,382,296.81
  5. Step 5: Solve for x
    x = 137,382,296.81/13,398.79
  6. Step 6: Final answer
    x = 10,253.34

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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.