Home / 5,158.40-7,118.28-2,920.16

Finding the Fourth Proportional to 5,158.40, 7,118.28 and 2,920.16

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Solution

The fourth proportional to 5,158.40, 7,118.28 and 2,920.16 is: 4,029.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,158.40 : 7,118.28 = 2,920.16 : x
  2. Step 2: Convert to fraction form
    5,158.40/7,118.28 = 2,920.16/x
  3. Step 3: Cross multiply
    5,158.40x = 7,118.28 × 2,920.16
  4. Step 4: Simplify right side
    5,158.40x = 20,786,516.52
  5. Step 5: Solve for x
    x = 20,786,516.52/5,158.40
  6. Step 6: Final answer
    x = 4,029.64

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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.