Home / 15,223.41-21,008.70-8,508.78

Finding the Fourth Proportional to 15,223.41, 21,008.70 and 8,508.78

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Solution

The fourth proportional to 15,223.41, 21,008.70 and 8,508.78 is: 11,742.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,223.41 : 21,008.70 = 8,508.78 : x
  2. Step 2: Convert to fraction form
    15,223.41/21,008.70 = 8,508.78/x
  3. Step 3: Cross multiply
    15,223.41x = 21,008.70 × 8,508.78
  4. Step 4: Simplify right side
    15,223.41x = 178,758,406.39
  5. Step 5: Solve for x
    x = 178,758,406.39/15,223.41
  6. Step 6: Final answer
    x = 11,742.34

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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.