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Finding the Fourth Proportional to 7,044, 9,720.56 and 3,900.16

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Solution

The fourth proportional to 7,044, 9,720.56 and 3,900.16 is: 5,382.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,044 : 9,720.56 = 3,900.16 : x
  2. Step 2: Convert to fraction form
    7,044/9,720.56 = 3,900.16/x
  3. Step 3: Cross multiply
    7,044x = 9,720.56 × 3,900.16
  4. Step 4: Simplify right side
    7,044x = 37,911,739.29
  5. Step 5: Solve for x
    x = 37,911,739.29/7,044
  6. Step 6: Final answer
    x = 5,382.13

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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.