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Finding the Fourth Proportional to 15,076.40, 20,806.71 and 8,364.19

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Solution

The fourth proportional to 15,076.40, 20,806.71 and 8,364.19 is: 11,543.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,076.40 : 20,806.71 = 8,364.19 : x
  2. Step 2: Convert to fraction form
    15,076.40/20,806.71 = 8,364.19/x
  3. Step 3: Cross multiply
    15,076.40x = 20,806.71 × 8,364.19
  4. Step 4: Simplify right side
    15,076.40x = 174,031,192.33
  5. Step 5: Solve for x
    x = 174,031,192.33/15,076.40
  6. Step 6: Final answer
    x = 11,543.29

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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.