Home / 20,852.92-28,776.08-11,421.28

Finding the Fourth Proportional to 20,852.92, 28,776.08 and 11,421.28

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Solution

The fourth proportional to 20,852.92, 28,776.08 and 11,421.28 is: 15,760.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,852.92 : 28,776.08 = 11,421.28 : x
  2. Step 2: Convert to fraction form
    20,852.92/28,776.08 = 11,421.28/x
  3. Step 3: Cross multiply
    20,852.92x = 28,776.08 × 11,421.28
  4. Step 4: Simplify right side
    20,852.92x = 328,659,666.98
  5. Step 5: Solve for x
    x = 328,659,666.98/20,852.92
  6. Step 6: Final answer
    x = 15,760.85

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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.