Home / 28,408.74-42,619.20-8,688.76

Finding the Fourth Proportional to 28,408.74, 42,619.20 and 8,688.76

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Solution

The fourth proportional to 28,408.74, 42,619.20 and 8,688.76 is: 13,035.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,408.74 : 42,619.20 = 8,688.76 : x
  2. Step 2: Convert to fraction form
    28,408.74/42,619.20 = 8,688.76/x
  3. Step 3: Cross multiply
    28,408.74x = 42,619.20 × 8,688.76
  4. Step 4: Simplify right side
    28,408.74x = 370,308,000.19
  5. Step 5: Solve for x
    x = 370,308,000.19/28,408.74
  6. Step 6: Final answer
    x = 13,035.00

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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.