Home / 28,619.12-42,891.73-12,812.58

Finding the Fourth Proportional to 28,619.12, 42,891.73 and 12,812.58

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Solution

The fourth proportional to 28,619.12, 42,891.73 and 12,812.58 is: 19,202.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,619.12 : 42,891.73 = 12,812.58 : x
  2. Step 2: Convert to fraction form
    28,619.12/42,891.73 = 12,812.58/x
  3. Step 3: Cross multiply
    28,619.12x = 42,891.73 × 12,812.58
  4. Step 4: Simplify right side
    28,619.12x = 549,553,689.93
  5. Step 5: Solve for x
    x = 549,553,689.93/28,619.12
  6. Step 6: Final answer
    x = 19,202.32

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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.