Home / 28,007.78-42,009.23-9,281.66

Finding the Fourth Proportional to 28,007.78, 42,009.23 and 9,281.66

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Solution

The fourth proportional to 28,007.78, 42,009.23 and 9,281.66 is: 13,921.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,007.78 : 42,009.23 = 9,281.66 : x
  2. Step 2: Convert to fraction form
    28,007.78/42,009.23 = 9,281.66/x
  3. Step 3: Cross multiply
    28,007.78x = 42,009.23 × 9,281.66
  4. Step 4: Simplify right side
    28,007.78x = 389,915,202.88
  5. Step 5: Solve for x
    x = 389,915,202.88/28,007.78
  6. Step 6: Final answer
    x = 13,921.68

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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.