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Finding the Fourth Proportional to 12,837.86, 17,710.97 and 7,801.28

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Solution

The fourth proportional to 12,837.86, 17,710.97 and 7,801.28 is: 10,762.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,837.86 : 17,710.97 = 7,801.28 : x
  2. Step 2: Convert to fraction form
    12,837.86/17,710.97 = 7,801.28/x
  3. Step 3: Cross multiply
    12,837.86x = 17,710.97 × 7,801.28
  4. Step 4: Simplify right side
    12,837.86x = 138,168,236.04
  5. Step 5: Solve for x
    x = 138,168,236.04/12,837.86
  6. Step 6: Final answer
    x = 10,762.56

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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.