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Finding the Fourth Proportional to 28,343.52, 39,114.72 and 15,768

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Solution

The fourth proportional to 28,343.52, 39,114.72 and 15,768 is: 21,760.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,343.52 : 39,114.72 = 15,768 : x
  2. Step 2: Convert to fraction form
    28,343.52/39,114.72 = 15,768/x
  3. Step 3: Cross multiply
    28,343.52x = 39,114.72 × 15,768
  4. Step 4: Simplify right side
    28,343.52x = 616,760,904.96
  5. Step 5: Solve for x
    x = 616,760,904.96/28,343.52
  6. Step 6: Final answer
    x = 21,760.21

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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.