Home / 15,432.78-21,297.27-8,359.21

Finding the Fourth Proportional to 15,432.78, 21,297.27 and 8,359.21

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Solution

The fourth proportional to 15,432.78, 21,297.27 and 8,359.21 is: 11,535.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,432.78 : 21,297.27 = 8,359.21 : x
  2. Step 2: Convert to fraction form
    15,432.78/21,297.27 = 8,359.21/x
  3. Step 3: Cross multiply
    15,432.78x = 21,297.27 × 8,359.21
  4. Step 4: Simplify right side
    15,432.78x = 178,028,204.07
  5. Step 5: Solve for x
    x = 178,028,204.07/15,432.78
  6. Step 6: Final answer
    x = 11,535.72

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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.