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Finding the Fourth Proportional to 12,448.72, 18,661.22 and 4,655.70

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Solution

The fourth proportional to 12,448.72, 18,661.22 and 4,655.70 is: 6,979.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,448.72 : 18,661.22 = 4,655.70 : x
  2. Step 2: Convert to fraction form
    12,448.72/18,661.22 = 4,655.70/x
  3. Step 3: Cross multiply
    12,448.72x = 18,661.22 × 4,655.70
  4. Step 4: Simplify right side
    12,448.72x = 86,881,041.95
  5. Step 5: Solve for x
    x = 86,881,041.95/12,448.72
  6. Step 6: Final answer
    x = 6,979.11

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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.