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Finding the Fourth Proportional to 22,810.70, 31,462.93 and 20,928.51

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Solution

The fourth proportional to 22,810.70, 31,462.93 and 20,928.51 is: 28,866.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,810.70 : 31,462.93 = 20,928.51 : x
  2. Step 2: Convert to fraction form
    22,810.70/31,462.93 = 20,928.51/x
  3. Step 3: Cross multiply
    22,810.70x = 31,462.93 × 20,928.51
  4. Step 4: Simplify right side
    22,810.70x = 658,472,245.13
  5. Step 5: Solve for x
    x = 658,472,245.13/22,810.70
  6. Step 6: Final answer
    x = 28,866.81

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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.