Home / 20,665.23-28,521.13-12,603.56

Finding the Fourth Proportional to 20,665.23, 28,521.13 and 12,603.56

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Solution

The fourth proportional to 20,665.23, 28,521.13 and 12,603.56 is: 17,394.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.23 : 28,521.13 = 12,603.56 : x
  2. Step 2: Convert to fraction form
    20,665.23/28,521.13 = 12,603.56/x
  3. Step 3: Cross multiply
    20,665.23x = 28,521.13 × 12,603.56
  4. Step 4: Simplify right side
    20,665.23x = 359,467,773.22
  5. Step 5: Solve for x
    x = 359,467,773.22/20,665.23
  6. Step 6: Final answer
    x = 17,394.81

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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.