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Finding the Fourth Proportional to 18,378.88, 25,354.72 and 11,301.12

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Solution

The fourth proportional to 18,378.88, 25,354.72 and 11,301.12 is: 15,590.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,378.88 : 25,354.72 = 11,301.12 : x
  2. Step 2: Convert to fraction form
    18,378.88/25,354.72 = 11,301.12/x
  3. Step 3: Cross multiply
    18,378.88x = 25,354.72 × 11,301.12
  4. Step 4: Simplify right side
    18,378.88x = 286,536,733.29
  5. Step 5: Solve for x
    x = 286,536,733.29/18,378.88
  6. Step 6: Final answer
    x = 15,590.54

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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.