Home / 12,979.23-19,468.85-7,428.71

Finding the Fourth Proportional to 12,979.23, 19,468.85 and 7,428.71

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Solution

The fourth proportional to 12,979.23, 19,468.85 and 7,428.71 is: 11,143.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,979.23 : 19,468.85 = 7,428.71 : x
  2. Step 2: Convert to fraction form
    12,979.23/19,468.85 = 7,428.71/x
  3. Step 3: Cross multiply
    12,979.23x = 19,468.85 × 7,428.71
  4. Step 4: Simplify right side
    12,979.23x = 144,628,306.20
  5. Step 5: Solve for x
    x = 144,628,306.20/12,979.23
  6. Step 6: Final answer
    x = 11,143.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.