Home / 13,357.20-18,432.80-7,388.80

Finding the Fourth Proportional to 13,357.20, 18,432.80 and 7,388.80

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Solution

The fourth proportional to 13,357.20, 18,432.80 and 7,388.80 is: 10,196.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,357.20 : 18,432.80 = 7,388.80 : x
  2. Step 2: Convert to fraction form
    13,357.20/18,432.80 = 7,388.80/x
  3. Step 3: Cross multiply
    13,357.20x = 18,432.80 × 7,388.80
  4. Step 4: Simplify right side
    13,357.20x = 136,196,272.64
  5. Step 5: Solve for x
    x = 136,196,272.64/13,357.20
  6. Step 6: Final answer
    x = 10,196.47

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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.