Home / 11,107.76-15,328.68-6,139.76

Finding the Fourth Proportional to 11,107.76, 15,328.68 and 6,139.76

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Solution

The fourth proportional to 11,107.76, 15,328.68 and 6,139.76 is: 8,472.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,107.76 : 15,328.68 = 6,139.76 : x
  2. Step 2: Convert to fraction form
    11,107.76/15,328.68 = 6,139.76/x
  3. Step 3: Cross multiply
    11,107.76x = 15,328.68 × 6,139.76
  4. Step 4: Simplify right side
    11,107.76x = 94,114,416.32
  5. Step 5: Solve for x
    x = 94,114,416.32/11,107.76
  6. Step 6: Final answer
    x = 8,472.85

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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.