Home / 15,508.62-21,401.93-8,435.05

Finding the Fourth Proportional to 15,508.62, 21,401.93 and 8,435.05

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Solution

The fourth proportional to 15,508.62, 21,401.93 and 8,435.05 is: 11,640.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,508.62 : 21,401.93 = 8,435.05 : x
  2. Step 2: Convert to fraction form
    15,508.62/21,401.93 = 8,435.05/x
  3. Step 3: Cross multiply
    15,508.62x = 21,401.93 × 8,435.05
  4. Step 4: Simplify right side
    15,508.62x = 180,526,349.65
  5. Step 5: Solve for x
    x = 180,526,349.65/15,508.62
  6. Step 6: Final answer
    x = 11,640.39

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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.