Home / 3,123.36-4,318.32-2,985.60

Finding the Fourth Proportional to 3,123.36, 4,318.32 and 2,985.60

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Solution

The fourth proportional to 3,123.36, 4,318.32 and 2,985.60 is: 4,127.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.36 : 4,318.32 = 2,985.60 : x
  2. Step 2: Convert to fraction form
    3,123.36/4,318.32 = 2,985.60/x
  3. Step 3: Cross multiply
    3,123.36x = 4,318.32 × 2,985.60
  4. Step 4: Simplify right side
    3,123.36x = 12,892,776.19
  5. Step 5: Solve for x
    x = 12,892,776.19/3,123.36
  6. Step 6: Final answer
    x = 4,127.85

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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.