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Finding the Fourth Proportional to 19,699.94, 29,526.42 and 9,155.72

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Solution

The fourth proportional to 19,699.94, 29,526.42 and 9,155.72 is: 13,722.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,699.94 : 29,526.42 = 9,155.72 : x
  2. Step 2: Convert to fraction form
    19,699.94/29,526.42 = 9,155.72/x
  3. Step 3: Cross multiply
    19,699.94x = 29,526.42 × 9,155.72
  4. Step 4: Simplify right side
    19,699.94x = 270,335,634.12
  5. Step 5: Solve for x
    x = 270,335,634.12/19,699.94
  6. Step 6: Final answer
    x = 13,722.66

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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.