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Finding the Fourth Proportional to 5,628.14, 7,828.88 and 5,521.22

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Solution

The fourth proportional to 5,628.14, 7,828.88 and 5,521.22 is: 7,680.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,628.14 : 7,828.88 = 5,521.22 : x
  2. Step 2: Convert to fraction form
    5,628.14/7,828.88 = 5,521.22/x
  3. Step 3: Cross multiply
    5,628.14x = 7,828.88 × 5,521.22
  4. Step 4: Simplify right side
    5,628.14x = 43,224,968.83
  5. Step 5: Solve for x
    x = 43,224,968.83/5,628.14
  6. Step 6: Final answer
    x = 7,680.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.