Home / 28,379.13-42,575.36-8,657.69

Finding the Fourth Proportional to 28,379.13, 42,575.36 and 8,657.69

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Solution

The fourth proportional to 28,379.13, 42,575.36 and 8,657.69 is: 12,988.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,379.13 : 42,575.36 = 8,657.69 : x
  2. Step 2: Convert to fraction form
    28,379.13/42,575.36 = 8,657.69/x
  3. Step 3: Cross multiply
    28,379.13x = 42,575.36 × 8,657.69
  4. Step 4: Simplify right side
    28,379.13x = 368,604,048.88
  5. Step 5: Solve for x
    x = 368,604,048.88/28,379.13
  6. Step 6: Final answer
    x = 12,988.56

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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.