Home / 3,885.17-5,360.74-2,688.28

Finding the Fourth Proportional to 3,885.17, 5,360.74 and 2,688.28

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Solution

The fourth proportional to 3,885.17, 5,360.74 and 2,688.28 is: 3,709.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,885.17 : 5,360.74 = 2,688.28 : x
  2. Step 2: Convert to fraction form
    3,885.17/5,360.74 = 2,688.28/x
  3. Step 3: Cross multiply
    3,885.17x = 5,360.74 × 2,688.28
  4. Step 4: Simplify right side
    3,885.17x = 14,411,170.13
  5. Step 5: Solve for x
    x = 14,411,170.13/3,885.17
  6. Step 6: Final answer
    x = 3,709.28

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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.