Home / 20,968.40-28,938.16-11,538.32

Finding the Fourth Proportional to 20,968.40, 28,938.16 and 11,538.32

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Solution

The fourth proportional to 20,968.40, 28,938.16 and 11,538.32 is: 15,923.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.40 : 28,938.16 = 11,538.32 : x
  2. Step 2: Convert to fraction form
    20,968.40/28,938.16 = 11,538.32/x
  3. Step 3: Cross multiply
    20,968.40x = 28,938.16 × 11,538.32
  4. Step 4: Simplify right side
    20,968.40x = 333,897,750.29
  5. Step 5: Solve for x
    x = 333,897,750.29/20,968.40
  6. Step 6: Final answer
    x = 15,923.85

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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.