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Finding the Fourth Proportional to 12,667.86, 17,479.80 and 7,953.66

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Solution

The fourth proportional to 12,667.86, 17,479.80 and 7,953.66 is: 10,974.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,667.86 : 17,479.80 = 7,953.66 : x
  2. Step 2: Convert to fraction form
    12,667.86/17,479.80 = 7,953.66/x
  3. Step 3: Cross multiply
    12,667.86x = 17,479.80 × 7,953.66
  4. Step 4: Simplify right side
    12,667.86x = 139,028,386.07
  5. Step 5: Solve for x
    x = 139,028,386.07/12,667.86
  6. Step 6: Final answer
    x = 10,974.89

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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.