Home / 20,556.94-28,381.98-12,603.55

Finding the Fourth Proportional to 20,556.94, 28,381.98 and 12,603.55

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Solution

The fourth proportional to 20,556.94, 28,381.98 and 12,603.55 is: 17,401.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,556.94 : 28,381.98 = 12,603.55 : x
  2. Step 2: Convert to fraction form
    20,556.94/28,381.98 = 12,603.55/x
  3. Step 3: Cross multiply
    20,556.94x = 28,381.98 × 12,603.55
  4. Step 4: Simplify right side
    20,556.94x = 357,713,704.03
  5. Step 5: Solve for x
    x = 357,713,704.03/20,556.94
  6. Step 6: Final answer
    x = 17,401.12

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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.