Home / 20,381.32-28,126.53-11,306.62

Finding the Fourth Proportional to 20,381.32, 28,126.53 and 11,306.62

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Solution

The fourth proportional to 20,381.32, 28,126.53 and 11,306.62 is: 15,603.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,381.32 : 28,126.53 = 11,306.62 : x
  2. Step 2: Convert to fraction form
    20,381.32/28,126.53 = 11,306.62/x
  3. Step 3: Cross multiply
    20,381.32x = 28,126.53 × 11,306.62
  4. Step 4: Simplify right side
    20,381.32x = 318,015,986.63
  5. Step 5: Solve for x
    x = 318,015,986.63/20,381.32
  6. Step 6: Final answer
    x = 15,603.31

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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.