Home / 28,321.12-42,483.12-10,787.68

Finding the Fourth Proportional to 28,321.12, 42,483.12 and 10,787.68

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Solution

The fourth proportional to 28,321.12, 42,483.12 and 10,787.68 is: 16,182.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,321.12 : 42,483.12 = 10,787.68 : x
  2. Step 2: Convert to fraction form
    28,321.12/42,483.12 = 10,787.68/x
  3. Step 3: Cross multiply
    28,321.12x = 42,483.12 × 10,787.68
  4. Step 4: Simplify right side
    28,321.12x = 458,294,303.96
  5. Step 5: Solve for x
    x = 458,294,303.96/28,321.12
  6. Step 6: Final answer
    x = 16,182.07

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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.