Home / 20,938.43-28,894.65-11,378.46

Finding the Fourth Proportional to 20,938.43, 28,894.65 and 11,378.46

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Solution

The fourth proportional to 20,938.43, 28,894.65 and 11,378.46 is: 15,702.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.43 : 28,894.65 = 11,378.46 : x
  2. Step 2: Convert to fraction form
    20,938.43/28,894.65 = 11,378.46/x
  3. Step 3: Cross multiply
    20,938.43x = 28,894.65 × 11,378.46
  4. Step 4: Simplify right side
    20,938.43x = 328,776,619.24
  5. Step 5: Solve for x
    x = 328,776,619.24/20,938.43
  6. Step 6: Final answer
    x = 15,702.07

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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.