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Finding the Fourth Proportional to 12,653.73, 18,964.08 and 9,155.52

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Solution

The fourth proportional to 12,653.73, 18,964.08 and 9,155.52 is: 13,721.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,653.73 : 18,964.08 = 9,155.52 : x
  2. Step 2: Convert to fraction form
    12,653.73/18,964.08 = 9,155.52/x
  3. Step 3: Cross multiply
    12,653.73x = 18,964.08 × 9,155.52
  4. Step 4: Simplify right side
    12,653.73x = 173,626,013.72
  5. Step 5: Solve for x
    x = 173,626,013.72/12,653.73
  6. Step 6: Final answer
    x = 13,721.33

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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.