Home / 20,962.91-28,920.43-13,407.50

Finding the Fourth Proportional to 20,962.91, 28,920.43 and 13,407.50

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Solution

The fourth proportional to 20,962.91, 28,920.43 and 13,407.50 is: 18,496.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,962.91 : 28,920.43 = 13,407.50 : x
  2. Step 2: Convert to fraction form
    20,962.91/28,920.43 = 13,407.50/x
  3. Step 3: Cross multiply
    20,962.91x = 28,920.43 × 13,407.50
  4. Step 4: Simplify right side
    20,962.91x = 387,750,665.23
  5. Step 5: Solve for x
    x = 387,750,665.23/20,962.91
  6. Step 6: Final answer
    x = 18,496.99

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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.