Home / 5,109.28-7,050.28-3,120.32

Finding the Fourth Proportional to 5,109.28, 7,050.28 and 3,120.32

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Solution

The fourth proportional to 5,109.28, 7,050.28 and 3,120.32 is: 4,305.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,109.28 : 7,050.28 = 3,120.32 : x
  2. Step 2: Convert to fraction form
    5,109.28/7,050.28 = 3,120.32/x
  3. Step 3: Cross multiply
    5,109.28x = 7,050.28 × 3,120.32
  4. Step 4: Simplify right side
    5,109.28x = 21,999,129.69
  5. Step 5: Solve for x
    x = 21,999,129.69/5,109.28
  6. Step 6: Final answer
    x = 4,305.72

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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.