Home / 20,888.28-28,809-18,365.04

Finding the Fourth Proportional to 20,888.28, 28,809 and 18,365.04

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Solution

The fourth proportional to 20,888.28, 28,809 and 18,365.04 is: 25,328.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.28 : 28,809 = 18,365.04 : x
  2. Step 2: Convert to fraction form
    20,888.28/28,809 = 18,365.04/x
  3. Step 3: Cross multiply
    20,888.28x = 28,809 × 18,365.04
  4. Step 4: Simplify right side
    20,888.28x = 529,078,437.36
  5. Step 5: Solve for x
    x = 529,078,437.36/20,888.28
  6. Step 6: Final answer
    x = 25,328.96

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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.