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Finding the Fourth Proportional to 69,009.76, 103,509.64 and 18,404.88

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Solution

The fourth proportional to 69,009.76, 103,509.64 and 18,404.88 is: 27,605.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,009.76 : 103,509.64 = 18,404.88 : x
  2. Step 2: Convert to fraction form
    69,009.76/103,509.64 = 18,404.88/x
  3. Step 3: Cross multiply
    69,009.76x = 103,509.64 × 18,404.88
  4. Step 4: Simplify right side
    69,009.76x = 1,905,082,503.04
  5. Step 5: Solve for x
    x = 1,905,082,503.04/69,009.76
  6. Step 6: Final answer
    x = 27,605.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.