Home / 20,907.31-28,852.96-11,954.81

Finding the Fourth Proportional to 20,907.31, 28,852.96 and 11,954.81

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Solution

The fourth proportional to 20,907.31, 28,852.96 and 11,954.81 is: 16,498.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,907.31 : 28,852.96 = 11,954.81 : x
  2. Step 2: Convert to fraction form
    20,907.31/28,852.96 = 11,954.81/x
  3. Step 3: Cross multiply
    20,907.31x = 28,852.96 × 11,954.81
  4. Step 4: Simplify right side
    20,907.31x = 344,931,480.59
  5. Step 5: Solve for x
    x = 344,931,480.59/20,907.31
  6. Step 6: Final answer
    x = 16,498.13

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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.