Home / 15,708.51-21,677.49-8,634.78

Finding the Fourth Proportional to 15,708.51, 21,677.49 and 8,634.78

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Solution

The fourth proportional to 15,708.51, 21,677.49 and 8,634.78 is: 11,915.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,708.51 : 21,677.49 = 8,634.78 : x
  2. Step 2: Convert to fraction form
    15,708.51/21,677.49 = 8,634.78/x
  3. Step 3: Cross multiply
    15,708.51x = 21,677.49 × 8,634.78
  4. Step 4: Simplify right side
    15,708.51x = 187,180,308.19
  5. Step 5: Solve for x
    x = 187,180,308.19/15,708.51
  6. Step 6: Final answer
    x = 11,915.86

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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.