Home / 28,315.80-42,473.70-20,005.20

Finding the Fourth Proportional to 28,315.80, 42,473.70 and 20,005.20

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Solution

The fourth proportional to 28,315.80, 42,473.70 and 20,005.20 is: 30,007.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,315.80 : 42,473.70 = 20,005.20 : x
  2. Step 2: Convert to fraction form
    28,315.80/42,473.70 = 20,005.20/x
  3. Step 3: Cross multiply
    28,315.80x = 42,473.70 × 20,005.20
  4. Step 4: Simplify right side
    28,315.80x = 849,694,863.24
  5. Step 5: Solve for x
    x = 849,694,863.24/28,315.80
  6. Step 6: Final answer
    x = 30,007.80

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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.