Home / 12,421.54-17,142.60-7,117.66

Finding the Fourth Proportional to 12,421.54, 17,142.60 and 7,117.66

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Solution

The fourth proportional to 12,421.54, 17,142.60 and 7,117.66 is: 9,822.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,421.54 : 17,142.60 = 7,117.66 : x
  2. Step 2: Convert to fraction form
    12,421.54/17,142.60 = 7,117.66/x
  3. Step 3: Cross multiply
    12,421.54x = 17,142.60 × 7,117.66
  4. Step 4: Simplify right side
    12,421.54x = 122,015,198.32
  5. Step 5: Solve for x
    x = 122,015,198.32/12,421.54
  6. Step 6: Final answer
    x = 9,822.87

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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.