Home / 13,390.26-18,478.60-7,422.04

Finding the Fourth Proportional to 13,390.26, 18,478.60 and 7,422.04

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Solution

The fourth proportional to 13,390.26, 18,478.60 and 7,422.04 is: 10,242.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.26 : 18,478.60 = 7,422.04 : x
  2. Step 2: Convert to fraction form
    13,390.26/18,478.60 = 7,422.04/x
  3. Step 3: Cross multiply
    13,390.26x = 18,478.60 × 7,422.04
  4. Step 4: Simplify right side
    13,390.26x = 137,148,908.34
  5. Step 5: Solve for x
    x = 137,148,908.34/13,390.26
  6. Step 6: Final answer
    x = 10,242.44

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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.