Home / 5,113.78-7,058.20-2,990.30

Finding the Fourth Proportional to 5,113.78, 7,058.20 and 2,990.30

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Solution

The fourth proportional to 5,113.78, 7,058.20 and 2,990.30 is: 4,127.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,113.78 : 7,058.20 = 2,990.30 : x
  2. Step 2: Convert to fraction form
    5,113.78/7,058.20 = 2,990.30/x
  3. Step 3: Cross multiply
    5,113.78x = 7,058.20 × 2,990.30
  4. Step 4: Simplify right side
    5,113.78x = 21,106,104.99
  5. Step 5: Solve for x
    x = 21,106,104.99/5,113.78
  6. Step 6: Final answer
    x = 4,127.30

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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.