Home / 5,157.96-7,118.64-2,920.20

Finding the Fourth Proportional to 5,157.96, 7,118.64 and 2,920.20

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Solution

The fourth proportional to 5,157.96, 7,118.64 and 2,920.20 is: 4,030.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,157.96 : 7,118.64 = 2,920.20 : x
  2. Step 2: Convert to fraction form
    5,157.96/7,118.64 = 2,920.20/x
  3. Step 3: Cross multiply
    5,157.96x = 7,118.64 × 2,920.20
  4. Step 4: Simplify right side
    5,157.96x = 20,787,852.53
  5. Step 5: Solve for x
    x = 20,787,852.53/5,157.96
  6. Step 6: Final answer
    x = 4,030.25

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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.