Home / 20,934.80-28,890.20-11,503.68

Finding the Fourth Proportional to 20,934.80, 28,890.20 and 11,503.68

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Solution

The fourth proportional to 20,934.80, 28,890.20 and 11,503.68 is: 15,875.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,934.80 : 28,890.20 = 11,503.68 : x
  2. Step 2: Convert to fraction form
    20,934.80/28,890.20 = 11,503.68/x
  3. Step 3: Cross multiply
    20,934.80x = 28,890.20 × 11,503.68
  4. Step 4: Simplify right side
    20,934.80x = 332,343,615.94
  5. Step 5: Solve for x
    x = 332,343,615.94/20,934.80
  6. Step 6: Final answer
    x = 15,875.18

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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.