Home / 7,123.07-9,830.97-3,979.26

Finding the Fourth Proportional to 7,123.07, 9,830.97 and 3,979.26

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Solution

The fourth proportional to 7,123.07, 9,830.97 and 3,979.26 is: 5,492.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,123.07 : 9,830.97 = 3,979.26 : x
  2. Step 2: Convert to fraction form
    7,123.07/9,830.97 = 3,979.26/x
  3. Step 3: Cross multiply
    7,123.07x = 9,830.97 × 3,979.26
  4. Step 4: Simplify right side
    7,123.07x = 39,119,985.68
  5. Step 5: Solve for x
    x = 39,119,985.68/7,123.07
  6. Step 6: Final answer
    x = 5,492.01

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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.