Home / 11,156.13-15,393.75-6,439.50

Finding the Fourth Proportional to 11,156.13, 15,393.75 and 6,439.50

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Solution

The fourth proportional to 11,156.13, 15,393.75 and 6,439.50 is: 8,885.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,156.13 : 15,393.75 = 6,439.50 : x
  2. Step 2: Convert to fraction form
    11,156.13/15,393.75 = 6,439.50/x
  3. Step 3: Cross multiply
    11,156.13x = 15,393.75 × 6,439.50
  4. Step 4: Simplify right side
    11,156.13x = 99,128,028.98
  5. Step 5: Solve for x
    x = 99,128,028.98/11,156.13
  6. Step 6: Final answer
    x = 8,885.52

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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.