Home / 13,391.02-18,478.29-7,422.54

Finding the Fourth Proportional to 13,391.02, 18,478.29 and 7,422.54

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Solution

The fourth proportional to 13,391.02, 18,478.29 and 7,422.54 is: 10,242.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,391.02 : 18,478.29 = 7,422.54 : x
  2. Step 2: Convert to fraction form
    13,391.02/18,478.29 = 7,422.54/x
  3. Step 3: Cross multiply
    13,391.02x = 18,478.29 × 7,422.54
  4. Step 4: Simplify right side
    13,391.02x = 137,155,805.20
  5. Step 5: Solve for x
    x = 137,155,805.20/13,391.02
  6. Step 6: Final answer
    x = 10,242.37

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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.