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Finding the Fourth Proportional to 28,927.76, 39,920.52 and 16,351.76

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Solution

The fourth proportional to 28,927.76, 39,920.52 and 16,351.76 is: 22,565.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,927.76 : 39,920.52 = 16,351.76 : x
  2. Step 2: Convert to fraction form
    28,927.76/39,920.52 = 16,351.76/x
  3. Step 3: Cross multiply
    28,927.76x = 39,920.52 × 16,351.76
  4. Step 4: Simplify right side
    28,927.76x = 652,770,762.12
  5. Step 5: Solve for x
    x = 652,770,762.12/28,927.76
  6. Step 6: Final answer
    x = 22,565.55

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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.