Home / 28,288.91-42,440.36-19,985.20

Finding the Fourth Proportional to 28,288.91, 42,440.36 and 19,985.20

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Solution

The fourth proportional to 28,288.91, 42,440.36 and 19,985.20 is: 29,982.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,288.91 : 42,440.36 = 19,985.20 : x
  2. Step 2: Convert to fraction form
    28,288.91/42,440.36 = 19,985.20/x
  3. Step 3: Cross multiply
    28,288.91x = 42,440.36 × 19,985.20
  4. Step 4: Simplify right side
    28,288.91x = 848,178,876.65
  5. Step 5: Solve for x
    x = 848,178,876.65/28,288.91
  6. Step 6: Final answer
    x = 29,982.73

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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.