Home / 28,438.86-42,644.25-8,712.66

Finding the Fourth Proportional to 28,438.86, 42,644.25 and 8,712.66

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Solution

The fourth proportional to 28,438.86, 42,644.25 and 8,712.66 is: 13,064.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,438.86 : 42,644.25 = 8,712.66 : x
  2. Step 2: Convert to fraction form
    28,438.86/42,644.25 = 8,712.66/x
  3. Step 3: Cross multiply
    28,438.86x = 42,644.25 × 8,712.66
  4. Step 4: Simplify right side
    28,438.86x = 371,544,851.21
  5. Step 5: Solve for x
    x = 371,544,851.21/28,438.86
  6. Step 6: Final answer
    x = 13,064.69

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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.