Home / 28,998.18-39,979.41-20,925.06

Finding the Fourth Proportional to 28,998.18, 39,979.41 and 20,925.06

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Solution

The fourth proportional to 28,998.18, 39,979.41 and 20,925.06 is: 28,849.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,998.18 : 39,979.41 = 20,925.06 : x
  2. Step 2: Convert to fraction form
    28,998.18/39,979.41 = 20,925.06/x
  3. Step 3: Cross multiply
    28,998.18x = 39,979.41 × 20,925.06
  4. Step 4: Simplify right side
    28,998.18x = 836,571,553.01
  5. Step 5: Solve for x
    x = 836,571,553.01/28,998.18
  6. Step 6: Final answer
    x = 28,849.11

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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.