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Finding the Fourth Proportional to 7,172.74, 9,897.32 and 4,028.32

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Solution

The fourth proportional to 7,172.74, 9,897.32 and 4,028.32 is: 5,558.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,172.74 : 9,897.32 = 4,028.32 : x
  2. Step 2: Convert to fraction form
    7,172.74/9,897.32 = 4,028.32/x
  3. Step 3: Cross multiply
    7,172.74x = 9,897.32 × 4,028.32
  4. Step 4: Simplify right side
    7,172.74x = 39,869,572.10
  5. Step 5: Solve for x
    x = 39,869,572.10/7,172.74
  6. Step 6: Final answer
    x = 5,558.49

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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.