Home / 20,913.32-31,363.33-6,870.09

Finding the Fourth Proportional to 20,913.32, 31,363.33 and 6,870.09

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Solution

The fourth proportional to 20,913.32, 31,363.33 and 6,870.09 is: 10,302.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.32 : 31,363.33 = 6,870.09 : x
  2. Step 2: Convert to fraction form
    20,913.32/31,363.33 = 6,870.09/x
  3. Step 3: Cross multiply
    20,913.32x = 31,363.33 × 6,870.09
  4. Step 4: Simplify right side
    20,913.32x = 215,468,899.80
  5. Step 5: Solve for x
    x = 215,468,899.80/20,913.32
  6. Step 6: Final answer
    x = 10,302.95

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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.