Home / 5,641.40-7,785.21-3,123.51

Finding the Fourth Proportional to 5,641.40, 7,785.21 and 3,123.51

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Solution

The fourth proportional to 5,641.40, 7,785.21 and 3,123.51 is: 4,310.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,641.40 : 7,785.21 = 3,123.51 : x
  2. Step 2: Convert to fraction form
    5,641.40/7,785.21 = 3,123.51/x
  3. Step 3: Cross multiply
    5,641.40x = 7,785.21 × 3,123.51
  4. Step 4: Simplify right side
    5,641.40x = 24,317,207.60
  5. Step 5: Solve for x
    x = 24,317,207.60/5,641.40
  6. Step 6: Final answer
    x = 4,310.49

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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.