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Finding the Fourth Proportional to 15,058.50, 20,780.73 and 8,434.50

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Solution

The fourth proportional to 15,058.50, 20,780.73 and 8,434.50 is: 11,639.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,058.50 : 20,780.73 = 8,434.50 : x
  2. Step 2: Convert to fraction form
    15,058.50/20,780.73 = 8,434.50/x
  3. Step 3: Cross multiply
    15,058.50x = 20,780.73 × 8,434.50
  4. Step 4: Simplify right side
    15,058.50x = 175,275,067.19
  5. Step 5: Solve for x
    x = 175,275,067.19/15,058.50
  6. Step 6: Final answer
    x = 11,639.61

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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.