Home / 20,852.13-28,776.36-11,420.70

Finding the Fourth Proportional to 20,852.13, 28,776.36 and 11,420.70

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Solution

The fourth proportional to 20,852.13, 28,776.36 and 11,420.70 is: 15,760.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,852.13 : 28,776.36 = 11,420.70 : x
  2. Step 2: Convert to fraction form
    20,852.13/28,776.36 = 11,420.70/x
  3. Step 3: Cross multiply
    20,852.13x = 28,776.36 × 11,420.70
  4. Step 4: Simplify right side
    20,852.13x = 328,646,174.65
  5. Step 5: Solve for x
    x = 328,646,174.65/20,852.13
  6. Step 6: Final answer
    x = 15,760.80

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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.