Home / 9,913.68-13,680.24-5,721.84

Finding the Fourth Proportional to 9,913.68, 13,680.24 and 5,721.84

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Solution

The fourth proportional to 9,913.68, 13,680.24 and 5,721.84 is: 7,895.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,913.68 : 13,680.24 = 5,721.84 : x
  2. Step 2: Convert to fraction form
    9,913.68/13,680.24 = 5,721.84/x
  3. Step 3: Cross multiply
    9,913.68x = 13,680.24 × 5,721.84
  4. Step 4: Simplify right side
    9,913.68x = 78,276,144.44
  5. Step 5: Solve for x
    x = 78,276,144.44/9,913.68
  6. Step 6: Final answer
    x = 7,895.77

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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.