Home / 5,157.81-7,117.56-2,919.69

Finding the Fourth Proportional to 5,157.81, 7,117.56 and 2,919.69

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Solution

The fourth proportional to 5,157.81, 7,117.56 and 2,919.69 is: 4,029.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,157.81 : 7,117.56 = 2,919.69 : x
  2. Step 2: Convert to fraction form
    5,157.81/7,117.56 = 2,919.69/x
  3. Step 3: Cross multiply
    5,157.81x = 7,117.56 × 2,919.69
  4. Step 4: Simplify right side
    5,157.81x = 20,781,068.76
  5. Step 5: Solve for x
    x = 20,781,068.76/5,157.81
  6. Step 6: Final answer
    x = 4,029.05

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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.