Home / 28,028.45-42,042.56-9,309.89

Finding the Fourth Proportional to 28,028.45, 42,042.56 and 9,309.89

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Solution

The fourth proportional to 28,028.45, 42,042.56 and 9,309.89 is: 13,964.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,028.45 : 42,042.56 = 9,309.89 : x
  2. Step 2: Convert to fraction form
    28,028.45/42,042.56 = 9,309.89/x
  3. Step 3: Cross multiply
    28,028.45x = 42,042.56 × 9,309.89
  4. Step 4: Simplify right side
    28,028.45x = 391,411,352.16
  5. Step 5: Solve for x
    x = 391,411,352.16/28,028.45
  6. Step 6: Final answer
    x = 13,964.79

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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.