Home / 20,972.50-28,941.80-11,412.66

Finding the Fourth Proportional to 20,972.50, 28,941.80 and 11,412.66

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Solution

The fourth proportional to 20,972.50, 28,941.80 and 11,412.66 is: 15,749.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.50 : 28,941.80 = 11,412.66 : x
  2. Step 2: Convert to fraction form
    20,972.50/28,941.80 = 11,412.66/x
  3. Step 3: Cross multiply
    20,972.50x = 28,941.80 × 11,412.66
  4. Step 4: Simplify right side
    20,972.50x = 330,302,923.19
  5. Step 5: Solve for x
    x = 330,302,923.19/20,972.50
  6. Step 6: Final answer
    x = 15,749.33

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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.