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Finding the Fourth Proportional to 5,662.30, 7,821.45 and 4,721.17

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Solution

The fourth proportional to 5,662.30, 7,821.45 and 4,721.17 is: 6,521.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,662.30 : 7,821.45 = 4,721.17 : x
  2. Step 2: Convert to fraction form
    5,662.30/7,821.45 = 4,721.17/x
  3. Step 3: Cross multiply
    5,662.30x = 7,821.45 × 4,721.17
  4. Step 4: Simplify right side
    5,662.30x = 36,926,395.10
  5. Step 5: Solve for x
    x = 36,926,395.10/5,662.30
  6. Step 6: Final answer
    x = 6,521.45

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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.