Home / 28,281.72-42,422.55-7,221.77

Finding the Fourth Proportional to 28,281.72, 42,422.55 and 7,221.77

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Solution

The fourth proportional to 28,281.72, 42,422.55 and 7,221.77 is: 10,832.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,281.72 : 42,422.55 = 7,221.77 : x
  2. Step 2: Convert to fraction form
    28,281.72/42,422.55 = 7,221.77/x
  3. Step 3: Cross multiply
    28,281.72x = 42,422.55 × 7,221.77
  4. Step 4: Simplify right side
    28,281.72x = 306,365,686.80
  5. Step 5: Solve for x
    x = 306,365,686.80/28,281.72
  6. Step 6: Final answer
    x = 10,832.64

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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.