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Finding the Fourth Proportional to 12,423.81, 17,144.99 and 7,118.51

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Solution

The fourth proportional to 12,423.81, 17,144.99 and 7,118.51 is: 9,823.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,423.81 : 17,144.99 = 7,118.51 : x
  2. Step 2: Convert to fraction form
    12,423.81/17,144.99 = 7,118.51/x
  3. Step 3: Cross multiply
    12,423.81x = 17,144.99 × 7,118.51
  4. Step 4: Simplify right side
    12,423.81x = 122,046,782.76
  5. Step 5: Solve for x
    x = 122,046,782.76/12,423.81
  6. Step 6: Final answer
    x = 9,823.62

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Double scale
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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.