Home / 20,971.76-31,455.93-6,180.44

Finding the Fourth Proportional to 20,971.76, 31,455.93 and 6,180.44

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Solution

The fourth proportional to 20,971.76, 31,455.93 and 6,180.44 is: 9,270.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.76 : 31,455.93 = 6,180.44 : x
  2. Step 2: Convert to fraction form
    20,971.76/31,455.93 = 6,180.44/x
  3. Step 3: Cross multiply
    20,971.76x = 31,455.93 × 6,180.44
  4. Step 4: Simplify right side
    20,971.76x = 194,411,488.01
  5. Step 5: Solve for x
    x = 194,411,488.01/20,971.76
  6. Step 6: Final answer
    x = 9,270.16

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1.5x scale

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.