Home / 3,927.57-5,420.08-2,135.06

Finding the Fourth Proportional to 3,927.57, 5,420.08 and 2,135.06

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Solution

The fourth proportional to 3,927.57, 5,420.08 and 2,135.06 is: 2,946.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,927.57 : 5,420.08 = 2,135.06 : x
  2. Step 2: Convert to fraction form
    3,927.57/5,420.08 = 2,135.06/x
  3. Step 3: Cross multiply
    3,927.57x = 5,420.08 × 2,135.06
  4. Step 4: Simplify right side
    3,927.57x = 11,572,168.90
  5. Step 5: Solve for x
    x = 11,572,168.90/3,927.57
  6. Step 6: Final answer
    x = 2,946.40

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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.