Home / 7,123.40-9,828.13-4,138.65

Finding the Fourth Proportional to 7,123.40, 9,828.13 and 4,138.65

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Solution

The fourth proportional to 7,123.40, 9,828.13 and 4,138.65 is: 5,710.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,123.40 : 9,828.13 = 4,138.65 : x
  2. Step 2: Convert to fraction form
    7,123.40/9,828.13 = 4,138.65/x
  3. Step 3: Cross multiply
    7,123.40x = 9,828.13 × 4,138.65
  4. Step 4: Simplify right side
    7,123.40x = 40,675,190.22
  5. Step 5: Solve for x
    x = 40,675,190.22/7,123.40
  6. Step 6: Final answer
    x = 5,710.08

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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.