Home / 19,880.50-27,432.13-11,381.28

Finding the Fourth Proportional to 19,880.50, 27,432.13 and 11,381.28

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Solution

The fourth proportional to 19,880.50, 27,432.13 and 11,381.28 is: 15,704.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,880.50 : 27,432.13 = 11,381.28 : x
  2. Step 2: Convert to fraction form
    19,880.50/27,432.13 = 11,381.28/x
  3. Step 3: Cross multiply
    19,880.50x = 27,432.13 × 11,381.28
  4. Step 4: Simplify right side
    19,880.50x = 312,212,695.62
  5. Step 5: Solve for x
    x = 312,212,695.62/19,880.50
  6. Step 6: Final answer
    x = 15,704.47

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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.