Home / 20,295.31-28,005.11-11,219.45

Finding the Fourth Proportional to 20,295.31, 28,005.11 and 11,219.45

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Solution

The fourth proportional to 20,295.31, 28,005.11 and 11,219.45 is: 15,481.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,295.31 : 28,005.11 = 11,219.45 : x
  2. Step 2: Convert to fraction form
    20,295.31/28,005.11 = 11,219.45/x
  3. Step 3: Cross multiply
    20,295.31x = 28,005.11 × 11,219.45
  4. Step 4: Simplify right side
    20,295.31x = 314,201,931.39
  5. Step 5: Solve for x
    x = 314,201,931.39/20,295.31
  6. Step 6: Final answer
    x = 15,481.50

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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.