Home / 7,122.24-9,828.36-4,138.20

Finding the Fourth Proportional to 7,122.24, 9,828.36 and 4,138.20

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Solution

The fourth proportional to 7,122.24, 9,828.36 and 4,138.20 is: 5,710.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.24 : 9,828.36 = 4,138.20 : x
  2. Step 2: Convert to fraction form
    7,122.24/9,828.36 = 4,138.20/x
  3. Step 3: Cross multiply
    7,122.24x = 9,828.36 × 4,138.20
  4. Step 4: Simplify right side
    7,122.24x = 40,671,719.35
  5. Step 5: Solve for x
    x = 40,671,719.35/7,122.24
  6. Step 6: Final answer
    x = 5,710.52

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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.