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Finding the Fourth Proportional to 12,904.61, 17,813.81 and 8,718.53

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Solution

The fourth proportional to 12,904.61, 17,813.81 and 8,718.53 is: 12,035.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,904.61 : 17,813.81 = 8,718.53 : x
  2. Step 2: Convert to fraction form
    12,904.61/17,813.81 = 8,718.53/x
  3. Step 3: Cross multiply
    12,904.61x = 17,813.81 × 8,718.53
  4. Step 4: Simplify right side
    12,904.61x = 155,310,236.90
  5. Step 5: Solve for x
    x = 155,310,236.90/12,904.61
  6. Step 6: Final answer
    x = 12,035.25

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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.