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Finding the Fourth Proportional to 12,243.65, 16,899.74 and 7,210.79

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Solution

The fourth proportional to 12,243.65, 16,899.74 and 7,210.79 is: 9,952.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,243.65 : 16,899.74 = 7,210.79 : x
  2. Step 2: Convert to fraction form
    12,243.65/16,899.74 = 7,210.79/x
  3. Step 3: Cross multiply
    12,243.65x = 16,899.74 × 7,210.79
  4. Step 4: Simplify right side
    12,243.65x = 121,860,415.92
  5. Step 5: Solve for x
    x = 121,860,415.92/12,243.65
  6. Step 6: Final answer
    x = 9,952.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.