Home / 20,871.69-31,307.58-5,289.33

Finding the Fourth Proportional to 20,871.69, 31,307.58 and 5,289.33

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Solution

The fourth proportional to 20,871.69, 31,307.58 and 5,289.33 is: 7,934.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.69 : 31,307.58 = 5,289.33 : x
  2. Step 2: Convert to fraction form
    20,871.69/31,307.58 = 5,289.33/x
  3. Step 3: Cross multiply
    20,871.69x = 31,307.58 × 5,289.33
  4. Step 4: Simplify right side
    20,871.69x = 165,596,122.12
  5. Step 5: Solve for x
    x = 165,596,122.12/20,871.69
  6. Step 6: Final answer
    x = 7,934.01

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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.