Home / 15,372.32-21,214.29-8,999.54

Finding the Fourth Proportional to 15,372.32, 21,214.29 and 8,999.54

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Solution

The fourth proportional to 15,372.32, 21,214.29 and 8,999.54 is: 12,419.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,372.32 : 21,214.29 = 8,999.54 : x
  2. Step 2: Convert to fraction form
    15,372.32/21,214.29 = 8,999.54/x
  3. Step 3: Cross multiply
    15,372.32x = 21,214.29 × 8,999.54
  4. Step 4: Simplify right side
    15,372.32x = 190,918,851.43
  5. Step 5: Solve for x
    x = 190,918,851.43/15,372.32
  6. Step 6: Final answer
    x = 12,419.65

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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.