Home / 20,938.35-28,895.13-11,378.28

Finding the Fourth Proportional to 20,938.35, 28,895.13 and 11,378.28

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Solution

The fourth proportional to 20,938.35, 28,895.13 and 11,378.28 is: 15,702.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.35 : 28,895.13 = 11,378.28 : x
  2. Step 2: Convert to fraction form
    20,938.35/28,895.13 = 11,378.28/x
  3. Step 3: Cross multiply
    20,938.35x = 28,895.13 × 11,378.28
  4. Step 4: Simplify right side
    20,938.35x = 328,776,879.78
  5. Step 5: Solve for x
    x = 328,776,879.78/20,938.35
  6. Step 6: Final answer
    x = 15,702.14

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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.