Home / 7,122.18-9,828.76-3,935.48

Finding the Fourth Proportional to 7,122.18, 9,828.76 and 3,935.48

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Solution

The fourth proportional to 7,122.18, 9,828.76 and 3,935.48 is: 5,431.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.18 : 9,828.76 = 3,935.48 : x
  2. Step 2: Convert to fraction form
    7,122.18/9,828.76 = 3,935.48/x
  3. Step 3: Cross multiply
    7,122.18x = 9,828.76 × 3,935.48
  4. Step 4: Simplify right side
    7,122.18x = 38,680,888.40
  5. Step 5: Solve for x
    x = 38,680,888.40/7,122.18
  6. Step 6: Final answer
    x = 5,431.05

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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.