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Finding the Fourth Proportional to 28,339.80, 42,525.90 and 10,822.20

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Solution

The fourth proportional to 28,339.80, 42,525.90 and 10,822.20 is: 16,239.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,339.80 : 42,525.90 = 10,822.20 : x
  2. Step 2: Convert to fraction form
    28,339.80/42,525.90 = 10,822.20/x
  3. Step 3: Cross multiply
    28,339.80x = 42,525.90 × 10,822.20
  4. Step 4: Simplify right side
    28,339.80x = 460,223,794.98
  5. Step 5: Solve for x
    x = 460,223,794.98/28,339.80
  6. Step 6: Final answer
    x = 16,239.49

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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.