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Finding the Fourth Proportional to 12,796.29, 17,656.55 and 7,130.90

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Solution

The fourth proportional to 12,796.29, 17,656.55 and 7,130.90 is: 9,839.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,796.29 : 17,656.55 = 7,130.90 : x
  2. Step 2: Convert to fraction form
    12,796.29/17,656.55 = 7,130.90/x
  3. Step 3: Cross multiply
    12,796.29x = 17,656.55 × 7,130.90
  4. Step 4: Simplify right side
    12,796.29x = 125,907,041.36
  5. Step 5: Solve for x
    x = 125,907,041.36/12,796.29
  6. Step 6: Final answer
    x = 9,839.34

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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.