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Finding the Fourth Proportional to 12,603.29, 18,915.86 and 12,574.13

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Solution

The fourth proportional to 12,603.29, 18,915.86 and 12,574.13 is: 18,872.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,603.29 : 18,915.86 = 12,574.13 : x
  2. Step 2: Convert to fraction form
    12,603.29/18,915.86 = 12,574.13/x
  3. Step 3: Cross multiply
    12,603.29x = 18,915.86 × 12,574.13
  4. Step 4: Simplify right side
    12,603.29x = 237,850,325.25
  5. Step 5: Solve for x
    x = 237,850,325.25/12,603.29
  6. Step 6: Final answer
    x = 18,872.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.