Home / 12,156.54-16,775.07-7,120.11

Finding the Fourth Proportional to 12,156.54, 16,775.07 and 7,120.11

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Solution

The fourth proportional to 12,156.54, 16,775.07 and 7,120.11 is: 9,825.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,156.54 : 16,775.07 = 7,120.11 : x
  2. Step 2: Convert to fraction form
    12,156.54/16,775.07 = 7,120.11/x
  3. Step 3: Cross multiply
    12,156.54x = 16,775.07 × 7,120.11
  4. Step 4: Simplify right side
    12,156.54x = 119,440,343.66
  5. Step 5: Solve for x
    x = 119,440,343.66/12,156.54
  6. Step 6: Final answer
    x = 9,825.19

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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.