Home / 20,816.40-28,726.74-11,256.27

Finding the Fourth Proportional to 20,816.40, 28,726.74 and 11,256.27

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Solution

The fourth proportional to 20,816.40, 28,726.74 and 11,256.27 is: 15,533.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.40 : 28,726.74 = 11,256.27 : x
  2. Step 2: Convert to fraction form
    20,816.40/28,726.74 = 11,256.27/x
  3. Step 3: Cross multiply
    20,816.40x = 28,726.74 × 11,256.27
  4. Step 4: Simplify right side
    20,816.40x = 323,355,941.66
  5. Step 5: Solve for x
    x = 323,355,941.66/20,816.40
  6. Step 6: Final answer
    x = 15,533.71

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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.