Home / 7,851.90-11,777.85-2,920.91

Finding the Fourth Proportional to 7,851.90, 11,777.85 and 2,920.91

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Solution

The fourth proportional to 7,851.90, 11,777.85 and 2,920.91 is: 4,381.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,851.90 : 11,777.85 = 2,920.91 : x
  2. Step 2: Convert to fraction form
    7,851.90/11,777.85 = 2,920.91/x
  3. Step 3: Cross multiply
    7,851.90x = 11,777.85 × 2,920.91
  4. Step 4: Simplify right side
    7,851.90x = 34,401,980.95
  5. Step 5: Solve for x
    x = 34,401,980.95/7,851.90
  6. Step 6: Final answer
    x = 4,381.36

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Similar ratio
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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.