Home / 11,315.67-15,616.36-6,279.90

Finding the Fourth Proportional to 11,315.67, 15,616.36 and 6,279.90

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Solution

The fourth proportional to 11,315.67, 15,616.36 and 6,279.90 is: 8,666.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,315.67 : 15,616.36 = 6,279.90 : x
  2. Step 2: Convert to fraction form
    11,315.67/15,616.36 = 6,279.90/x
  3. Step 3: Cross multiply
    11,315.67x = 15,616.36 × 6,279.90
  4. Step 4: Simplify right side
    11,315.67x = 98,069,179.16
  5. Step 5: Solve for x
    x = 98,069,179.16/11,315.67
  6. Step 6: Final answer
    x = 8,666.67

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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.