Home / 28,420.91-42,629.85-8,699.48

Finding the Fourth Proportional to 28,420.91, 42,629.85 and 8,699.48

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Solution

The fourth proportional to 28,420.91, 42,629.85 and 8,699.48 is: 13,048.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,420.91 : 42,629.85 = 8,699.48 : x
  2. Step 2: Convert to fraction form
    28,420.91/42,629.85 = 8,699.48/x
  3. Step 3: Cross multiply
    28,420.91x = 42,629.85 × 8,699.48
  4. Step 4: Simplify right side
    28,420.91x = 370,857,527.48
  5. Step 5: Solve for x
    x = 370,857,527.48/28,420.91
  6. Step 6: Final answer
    x = 13,048.76

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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.