Home / 7,917.18-10,920.95-5,228.43

Finding the Fourth Proportional to 7,917.18, 10,920.95 and 5,228.43

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Solution

The fourth proportional to 7,917.18, 10,920.95 and 5,228.43 is: 7,212.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,917.18 : 10,920.95 = 5,228.43 : x
  2. Step 2: Convert to fraction form
    7,917.18/10,920.95 = 5,228.43/x
  3. Step 3: Cross multiply
    7,917.18x = 10,920.95 × 5,228.43
  4. Step 4: Simplify right side
    7,917.18x = 57,099,341.86
  5. Step 5: Solve for x
    x = 57,099,341.86/7,917.18
  6. Step 6: Final answer
    x = 7,212.08

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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.