Home / 20,851.77-31,277.75-5,269.40

Finding the Fourth Proportional to 20,851.77, 31,277.75 and 5,269.40

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Solution

The fourth proportional to 20,851.77, 31,277.75 and 5,269.40 is: 7,904.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.77 : 31,277.75 = 5,269.40 : x
  2. Step 2: Convert to fraction form
    20,851.77/31,277.75 = 5,269.40/x
  3. Step 3: Cross multiply
    20,851.77x = 31,277.75 × 5,269.40
  4. Step 4: Simplify right side
    20,851.77x = 164,814,793.11
  5. Step 5: Solve for x
    x = 164,814,793.11/20,851.77
  6. Step 6: Final answer
    x = 7,904.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.