Home / 13,399.28-18,490.64-7,430.88

Finding the Fourth Proportional to 13,399.28, 18,490.64 and 7,430.88

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Solution

The fourth proportional to 13,399.28, 18,490.64 and 7,430.88 is: 10,254.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,399.28 : 18,490.64 = 7,430.88 : x
  2. Step 2: Convert to fraction form
    13,399.28/18,490.64 = 7,430.88/x
  3. Step 3: Cross multiply
    13,399.28x = 18,490.64 × 7,430.88
  4. Step 4: Simplify right side
    13,399.28x = 137,401,726.96
  5. Step 5: Solve for x
    x = 137,401,726.96/13,399.28
  6. Step 6: Final answer
    x = 10,254.41

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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.