Home / 13,399.11-18,490.65-7,430.79

Finding the Fourth Proportional to 13,399.11, 18,490.65 and 7,430.79

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Solution

The fourth proportional to 13,399.11, 18,490.65 and 7,430.79 is: 10,254.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,399.11 : 18,490.65 = 7,430.79 : x
  2. Step 2: Convert to fraction form
    13,399.11/18,490.65 = 7,430.79/x
  3. Step 3: Cross multiply
    13,399.11x = 18,490.65 × 7,430.79
  4. Step 4: Simplify right side
    13,399.11x = 137,400,137.11
  5. Step 5: Solve for x
    x = 137,400,137.11/13,399.11
  6. Step 6: Final answer
    x = 10,254.42

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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.