Home / 12,478.08-17,219.28-6,812.64

Finding the Fourth Proportional to 12,478.08, 17,219.28 and 6,812.64

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Solution

The fourth proportional to 12,478.08, 17,219.28 and 6,812.64 is: 9,401.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478.08 : 17,219.28 = 6,812.64 : x
  2. Step 2: Convert to fraction form
    12,478.08/17,219.28 = 6,812.64/x
  3. Step 3: Cross multiply
    12,478.08x = 17,219.28 × 6,812.64
  4. Step 4: Simplify right side
    12,478.08x = 117,308,755.70
  5. Step 5: Solve for x
    x = 117,308,755.70/12,478.08
  6. Step 6: Final answer
    x = 9,401.19

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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.