Home / 12,156.03-16,775.13-7,122.81

Finding the Fourth Proportional to 12,156.03, 16,775.13 and 7,122.81

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Solution

The fourth proportional to 12,156.03, 16,775.13 and 7,122.81 is: 9,829.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,156.03 : 16,775.13 = 7,122.81 : x
  2. Step 2: Convert to fraction form
    12,156.03/16,775.13 = 7,122.81/x
  3. Step 3: Cross multiply
    12,156.03x = 16,775.13 × 7,122.81
  4. Step 4: Simplify right side
    12,156.03x = 119,486,063.72
  5. Step 5: Solve for x
    x = 119,486,063.72/12,156.03
  6. Step 6: Final answer
    x = 9,829.37

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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.