Home / 13,749.60-18,926.28-11,978.13

Finding the Fourth Proportional to 13,749.60, 18,926.28 and 11,978.13

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Solution

The fourth proportional to 13,749.60, 18,926.28 and 11,978.13 is: 16,487.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,749.60 : 18,926.28 = 11,978.13 : x
  2. Step 2: Convert to fraction form
    13,749.60/18,926.28 = 11,978.13/x
  3. Step 3: Cross multiply
    13,749.60x = 18,926.28 × 11,978.13
  4. Step 4: Simplify right side
    13,749.60x = 226,701,442.26
  5. Step 5: Solve for x
    x = 226,701,442.26/13,749.60
  6. Step 6: Final answer
    x = 16,487.86

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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.