Home / 20,561.95-28,373.39-11,946.79

Finding the Fourth Proportional to 20,561.95, 28,373.39 and 11,946.79

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Solution

The fourth proportional to 20,561.95, 28,373.39 and 11,946.79 is: 16,485.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.95 : 28,373.39 = 11,946.79 : x
  2. Step 2: Convert to fraction form
    20,561.95/28,373.39 = 11,946.79/x
  3. Step 3: Cross multiply
    20,561.95x = 28,373.39 × 11,946.79
  4. Step 4: Simplify right side
    20,561.95x = 338,970,952.45
  5. Step 5: Solve for x
    x = 338,970,952.45/20,561.95
  6. Step 6: Final answer
    x = 16,485.35

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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.