Home / 20,852.56-28,776.54-11,421.70

Finding the Fourth Proportional to 20,852.56, 28,776.54 and 11,421.70

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Solution

The fourth proportional to 20,852.56, 28,776.54 and 11,421.70 is: 15,761.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,852.56 : 28,776.54 = 11,421.70 : x
  2. Step 2: Convert to fraction form
    20,852.56/28,776.54 = 11,421.70/x
  3. Step 3: Cross multiply
    20,852.56x = 28,776.54 × 11,421.70
  4. Step 4: Simplify right side
    20,852.56x = 328,677,006.92
  5. Step 5: Solve for x
    x = 328,677,006.92/20,852.56
  6. Step 6: Final answer
    x = 15,761.95

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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.