Home / 28,355.13-42,518.12-12,764.25

Finding the Fourth Proportional to 28,355.13, 42,518.12 and 12,764.25

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Solution

The fourth proportional to 28,355.13, 42,518.12 and 12,764.25 is: 19,139.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,355.13 : 42,518.12 = 12,764.25 : x
  2. Step 2: Convert to fraction form
    28,355.13/42,518.12 = 12,764.25/x
  3. Step 3: Cross multiply
    28,355.13x = 42,518.12 × 12,764.25
  4. Step 4: Simplify right side
    28,355.13x = 542,711,849.39
  5. Step 5: Solve for x
    x = 542,711,849.39/28,355.13
  6. Step 6: Final answer
    x = 19,139.81

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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.