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Finding the Fourth Proportional to 12,616.23, 18,835.63 and 9,639.07

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Solution

The fourth proportional to 12,616.23, 18,835.63 and 9,639.07 is: 14,390.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,616.23 : 18,835.63 = 9,639.07 : x
  2. Step 2: Convert to fraction form
    12,616.23/18,835.63 = 9,639.07/x
  3. Step 3: Cross multiply
    12,616.23x = 18,835.63 × 9,639.07
  4. Step 4: Simplify right side
    12,616.23x = 181,557,956.06
  5. Step 5: Solve for x
    x = 181,557,956.06/12,616.23
  6. Step 6: Final answer
    x = 14,390.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.