Home / 28,300.03-42,340.29-20,420.69

Finding the Fourth Proportional to 28,300.03, 42,340.29 and 20,420.69

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Solution

The fourth proportional to 28,300.03, 42,340.29 and 20,420.69 is: 30,551.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,300.03 : 42,340.29 = 20,420.69 : x
  2. Step 2: Convert to fraction form
    28,300.03/42,340.29 = 20,420.69/x
  3. Step 3: Cross multiply
    28,300.03x = 42,340.29 × 20,420.69
  4. Step 4: Simplify right side
    28,300.03x = 864,617,648.32
  5. Step 5: Solve for x
    x = 864,617,648.32/28,300.03
  6. Step 6: Final answer
    x = 30,551.83

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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.