Home / 20,538.96-28,343.75-11,107.50

Finding the Fourth Proportional to 20,538.96, 28,343.75 and 11,107.50

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Solution

The fourth proportional to 20,538.96, 28,343.75 and 11,107.50 is: 15,328.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.96 : 28,343.75 = 11,107.50 : x
  2. Step 2: Convert to fraction form
    20,538.96/28,343.75 = 11,107.50/x
  3. Step 3: Cross multiply
    20,538.96x = 28,343.75 × 11,107.50
  4. Step 4: Simplify right side
    20,538.96x = 314,828,147.59
  5. Step 5: Solve for x
    x = 314,828,147.59/20,538.96
  6. Step 6: Final answer
    x = 15,328.34

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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.