Home / 28,313.53-39,015.11-21,901.18

Finding the Fourth Proportional to 28,313.53, 39,015.11 and 21,901.18

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Solution

The fourth proportional to 28,313.53, 39,015.11 and 21,901.18 is: 30,179.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,313.53 : 39,015.11 = 21,901.18 : x
  2. Step 2: Convert to fraction form
    28,313.53/39,015.11 = 21,901.18/x
  3. Step 3: Cross multiply
    28,313.53x = 39,015.11 × 21,901.18
  4. Step 4: Simplify right side
    28,313.53x = 854,476,642.25
  5. Step 5: Solve for x
    x = 854,476,642.25/28,313.53
  6. Step 6: Final answer
    x = 30,179.10

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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.