Home / 18,881.18-28,431.56-13,985.54

Finding the Fourth Proportional to 18,881.18, 28,431.56 and 13,985.54

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Solution

The fourth proportional to 18,881.18, 28,431.56 and 13,985.54 is: 21,059.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,881.18 : 28,431.56 = 13,985.54 : x
  2. Step 2: Convert to fraction form
    18,881.18/28,431.56 = 13,985.54/x
  3. Step 3: Cross multiply
    18,881.18x = 28,431.56 × 13,985.54
  4. Step 4: Simplify right side
    18,881.18x = 397,630,719.64
  5. Step 5: Solve for x
    x = 397,630,719.64/18,881.18
  6. Step 6: Final answer
    x = 21,059.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.