Home / 20,943.90-31,378.95-11,061.41

Finding the Fourth Proportional to 20,943.90, 31,378.95 and 11,061.41

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Solution

The fourth proportional to 20,943.90, 31,378.95 and 11,061.41 is: 16,572.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.90 : 31,378.95 = 11,061.41 : x
  2. Step 2: Convert to fraction form
    20,943.90/31,378.95 = 11,061.41/x
  3. Step 3: Cross multiply
    20,943.90x = 31,378.95 × 11,061.41
  4. Step 4: Simplify right side
    20,943.90x = 347,095,274.42
  5. Step 5: Solve for x
    x = 347,095,274.42/20,943.90
  6. Step 6: Final answer
    x = 16,572.62

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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.