Home / 28,328.16-42,512.56-18,986

Finding the Fourth Proportional to 28,328.16, 42,512.56 and 18,986

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Solution

The fourth proportional to 28,328.16, 42,512.56 and 18,986 is: 28,492.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,328.16 : 42,512.56 = 18,986 : x
  2. Step 2: Convert to fraction form
    28,328.16/42,512.56 = 18,986/x
  3. Step 3: Cross multiply
    28,328.16x = 42,512.56 × 18,986
  4. Step 4: Simplify right side
    28,328.16x = 807,143,464.16
  5. Step 5: Solve for x
    x = 807,143,464.16/28,328.16
  6. Step 6: Final answer
    x = 28,492.62

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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.