Home / 13,390.46-18,478.97-7,422.23

Finding the Fourth Proportional to 13,390.46, 18,478.97 and 7,422.23

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Solution

The fourth proportional to 13,390.46, 18,478.97 and 7,422.23 is: 10,242.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.46 : 18,478.97 = 7,422.23 : x
  2. Step 2: Convert to fraction form
    13,390.46/18,478.97 = 7,422.23/x
  3. Step 3: Cross multiply
    13,390.46x = 18,478.97 × 7,422.23
  4. Step 4: Simplify right side
    13,390.46x = 137,155,036.00
  5. Step 5: Solve for x
    x = 137,155,036.00/13,390.46
  6. Step 6: Final answer
    x = 10,242.74

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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.