Home / 28,973.90-39,981.30-16,398.65

Finding the Fourth Proportional to 28,973.90, 39,981.30 and 16,398.65

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Solution

The fourth proportional to 28,973.90, 39,981.30 and 16,398.65 is: 22,628.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,973.90 : 39,981.30 = 16,398.65 : x
  2. Step 2: Convert to fraction form
    28,973.90/39,981.30 = 16,398.65/x
  3. Step 3: Cross multiply
    28,973.90x = 39,981.30 × 16,398.65
  4. Step 4: Simplify right side
    28,973.90x = 655,639,383.70
  5. Step 5: Solve for x
    x = 655,639,383.70/28,973.90
  6. Step 6: Final answer
    x = 22,628.62

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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.