Home / 12,456.54-17,190.90-7,151.45

Finding the Fourth Proportional to 12,456.54, 17,190.90 and 7,151.45

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Solution

The fourth proportional to 12,456.54, 17,190.90 and 7,151.45 is: 9,869.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,456.54 : 17,190.90 = 7,151.45 : x
  2. Step 2: Convert to fraction form
    12,456.54/17,190.90 = 7,151.45/x
  3. Step 3: Cross multiply
    12,456.54x = 17,190.90 × 7,151.45
  4. Step 4: Simplify right side
    12,456.54x = 122,939,775.85
  5. Step 5: Solve for x
    x = 122,939,775.85/12,456.54
  6. Step 6: Final answer
    x = 9,869.50

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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.