Home / 20,845.81-28,766.98-11,285.46

Finding the Fourth Proportional to 20,845.81, 28,766.98 and 11,285.46

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Solution

The fourth proportional to 20,845.81, 28,766.98 and 11,285.46 is: 15,573.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,845.81 : 28,766.98 = 11,285.46 : x
  2. Step 2: Convert to fraction form
    20,845.81/28,766.98 = 11,285.46/x
  3. Step 3: Cross multiply
    20,845.81x = 28,766.98 × 11,285.46
  4. Step 4: Simplify right side
    20,845.81x = 324,648,602.11
  5. Step 5: Solve for x
    x = 324,648,602.11/20,845.81
  6. Step 6: Final answer
    x = 15,573.81

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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.