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Finding the Fourth Proportional to 12,637.79, 17,440.33 and 6,972.79

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Solution

The fourth proportional to 12,637.79, 17,440.33 and 6,972.79 is: 9,622.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,637.79 : 17,440.33 = 6,972.79 : x
  2. Step 2: Convert to fraction form
    12,637.79/17,440.33 = 6,972.79/x
  3. Step 3: Cross multiply
    12,637.79x = 17,440.33 × 6,972.79
  4. Step 4: Simplify right side
    12,637.79x = 121,607,723.74
  5. Step 5: Solve for x
    x = 121,607,723.74/12,637.79
  6. Step 6: Final answer
    x = 9,622.54

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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.