Home / 11,151.61-15,394.11-7,807.55

Finding the Fourth Proportional to 11,151.61, 15,394.11 and 7,807.55

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Solution

The fourth proportional to 11,151.61, 15,394.11 and 7,807.55 is: 10,777.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,151.61 : 15,394.11 = 7,807.55 : x
  2. Step 2: Convert to fraction form
    11,151.61/15,394.11 = 7,807.55/x
  3. Step 3: Cross multiply
    11,151.61x = 15,394.11 × 7,807.55
  4. Step 4: Simplify right side
    11,151.61x = 120,190,206.56
  5. Step 5: Solve for x
    x = 120,190,206.56/11,151.61
  6. Step 6: Final answer
    x = 10,777.84

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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.