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Finding the Fourth Proportional to 18,969.55, 28,455.71 and 7,282.77

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Solution

The fourth proportional to 18,969.55, 28,455.71 and 7,282.77 is: 10,924.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,969.55 : 28,455.71 = 7,282.77 : x
  2. Step 2: Convert to fraction form
    18,969.55/28,455.71 = 7,282.77/x
  3. Step 3: Cross multiply
    18,969.55x = 28,455.71 × 7,282.77
  4. Step 4: Simplify right side
    18,969.55x = 207,236,391.12
  5. Step 5: Solve for x
    x = 207,236,391.12/18,969.55
  6. Step 6: Final answer
    x = 10,924.69

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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.