Home / 13,399.27-18,490.70-7,430.90

Finding the Fourth Proportional to 13,399.27, 18,490.70 and 7,430.90

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Solution

The fourth proportional to 13,399.27, 18,490.70 and 7,430.90 is: 10,254.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,399.27 : 18,490.70 = 7,430.90 : x
  2. Step 2: Convert to fraction form
    13,399.27/18,490.70 = 7,430.90/x
  3. Step 3: Cross multiply
    13,399.27x = 18,490.70 × 7,430.90
  4. Step 4: Simplify right side
    13,399.27x = 137,402,468.75
  5. Step 5: Solve for x
    x = 137,402,468.75/13,399.27
  6. Step 6: Final answer
    x = 10,254.48

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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.