Home / 20,515.93-28,304.40-15,736.72

Finding the Fourth Proportional to 20,515.93, 28,304.40 and 15,736.72

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Solution

The fourth proportional to 20,515.93, 28,304.40 and 15,736.72 is: 21,710.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.93 : 28,304.40 = 15,736.72 : x
  2. Step 2: Convert to fraction form
    20,515.93/28,304.40 = 15,736.72/x
  3. Step 3: Cross multiply
    20,515.93x = 28,304.40 × 15,736.72
  4. Step 4: Simplify right side
    20,515.93x = 445,418,417.57
  5. Step 5: Solve for x
    x = 445,418,417.57/20,515.93
  6. Step 6: Final answer
    x = 21,710.86

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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.