Home / 28,565.18-42,858.04-12,768.90

Finding the Fourth Proportional to 28,565.18, 42,858.04 and 12,768.90

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Solution

The fourth proportional to 28,565.18, 42,858.04 and 12,768.90 is: 19,157.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,565.18 : 42,858.04 = 12,768.90 : x
  2. Step 2: Convert to fraction form
    28,565.18/42,858.04 = 12,768.90/x
  3. Step 3: Cross multiply
    28,565.18x = 42,858.04 × 12,768.90
  4. Step 4: Simplify right side
    28,565.18x = 547,250,026.96
  5. Step 5: Solve for x
    x = 547,250,026.96/28,565.18
  6. Step 6: Final answer
    x = 19,157.94

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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.