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Finding the Fourth Proportional to 18,765.64, 25,866.76 and 14,780.44

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Solution

The fourth proportional to 18,765.64, 25,866.76 and 14,780.44 is: 20,373.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,765.64 : 25,866.76 = 14,780.44 : x
  2. Step 2: Convert to fraction form
    18,765.64/25,866.76 = 14,780.44/x
  3. Step 3: Cross multiply
    18,765.64x = 25,866.76 × 14,780.44
  4. Step 4: Simplify right side
    18,765.64x = 382,322,094.17
  5. Step 5: Solve for x
    x = 382,322,094.17/18,765.64
  6. Step 6: Final answer
    x = 20,373.52

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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.