Home / 20,875.96-28,800.66-18,223.48

Finding the Fourth Proportional to 20,875.96, 28,800.66 and 18,223.48

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Solution

The fourth proportional to 20,875.96, 28,800.66 and 18,223.48 is: 25,141.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,875.96 : 28,800.66 = 18,223.48 : x
  2. Step 2: Convert to fraction form
    20,875.96/28,800.66 = 18,223.48/x
  3. Step 3: Cross multiply
    20,875.96x = 28,800.66 × 18,223.48
  4. Step 4: Simplify right side
    20,875.96x = 524,848,251.50
  5. Step 5: Solve for x
    x = 524,848,251.50/20,875.96
  6. Step 6: Final answer
    x = 25,141.28

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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.