Home / 20,816.51-28,726.08-11,866.90

Finding the Fourth Proportional to 20,816.51, 28,726.08 and 11,866.90

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Solution

The fourth proportional to 20,816.51, 28,726.08 and 11,866.90 is: 16,375.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.51 : 28,726.08 = 11,866.90 : x
  2. Step 2: Convert to fraction form
    20,816.51/28,726.08 = 11,866.90/x
  3. Step 3: Cross multiply
    20,816.51x = 28,726.08 × 11,866.90
  4. Step 4: Simplify right side
    20,816.51x = 340,889,532.41
  5. Step 5: Solve for x
    x = 340,889,532.41/20,816.51
  6. Step 6: Final answer
    x = 16,375.92

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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.