Home / 28,078.64-38,732.28-18,142.64

Finding the Fourth Proportional to 28,078.64, 38,732.28 and 18,142.64

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Solution

The fourth proportional to 28,078.64, 38,732.28 and 18,142.64 is: 25,026.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,078.64 : 38,732.28 = 18,142.64 : x
  2. Step 2: Convert to fraction form
    28,078.64/38,732.28 = 18,142.64/x
  3. Step 3: Cross multiply
    28,078.64x = 38,732.28 × 18,142.64
  4. Step 4: Simplify right side
    28,078.64x = 702,705,812.42
  5. Step 5: Solve for x
    x = 702,705,812.42/28,078.64
  6. Step 6: Final answer
    x = 25,026.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.