Home / 15,211.60-21,020.88-10,976.56

Finding the Fourth Proportional to 15,211.60, 21,020.88 and 10,976.56

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Solution

The fourth proportional to 15,211.60, 21,020.88 and 10,976.56 is: 15,168.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,211.60 : 21,020.88 = 10,976.56 : x
  2. Step 2: Convert to fraction form
    15,211.60/21,020.88 = 10,976.56/x
  3. Step 3: Cross multiply
    15,211.60x = 21,020.88 × 10,976.56
  4. Step 4: Simplify right side
    15,211.60x = 230,736,950.57
  5. Step 5: Solve for x
    x = 230,736,950.57/15,211.60
  6. Step 6: Final answer
    x = 15,168.49

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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.