Home / 28,647.39-42,920.24-11,970.66

Finding the Fourth Proportional to 28,647.39, 42,920.24 and 11,970.66

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Solution

The fourth proportional to 28,647.39, 42,920.24 and 11,970.66 is: 17,934.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,647.39 : 42,920.24 = 11,970.66 : x
  2. Step 2: Convert to fraction form
    28,647.39/42,920.24 = 11,970.66/x
  3. Step 3: Cross multiply
    28,647.39x = 42,920.24 × 11,970.66
  4. Step 4: Simplify right side
    28,647.39x = 513,783,540.31
  5. Step 5: Solve for x
    x = 513,783,540.31/28,647.39
  6. Step 6: Final answer
    x = 17,934.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.