Home / 8,813.76-13,223.28-5,115.12

Finding the Fourth Proportional to 8,813.76, 13,223.28 and 5,115.12

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Solution

The fourth proportional to 8,813.76, 13,223.28 and 5,115.12 is: 7,674.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,813.76 : 13,223.28 = 5,115.12 : x
  2. Step 2: Convert to fraction form
    8,813.76/13,223.28 = 5,115.12/x
  3. Step 3: Cross multiply
    8,813.76x = 13,223.28 × 5,115.12
  4. Step 4: Simplify right side
    8,813.76x = 67,638,663.99
  5. Step 5: Solve for x
    x = 67,638,663.99/8,813.76
  6. Step 6: Final answer
    x = 7,674.21

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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.