Home / 15,375.39-21,220.05-8,662.32

Finding the Fourth Proportional to 15,375.39, 21,220.05 and 8,662.32

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Solution

The fourth proportional to 15,375.39, 21,220.05 and 8,662.32 is: 11,955.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,375.39 : 21,220.05 = 8,662.32 : x
  2. Step 2: Convert to fraction form
    15,375.39/21,220.05 = 8,662.32/x
  3. Step 3: Cross multiply
    15,375.39x = 21,220.05 × 8,662.32
  4. Step 4: Simplify right side
    15,375.39x = 183,814,863.52
  5. Step 5: Solve for x
    x = 183,814,863.52/15,375.39
  6. Step 6: Final answer
    x = 11,955.14

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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.