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Finding the Fourth Proportional to 12,603.40, 18,905.10 and 12,473.80

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Solution

The fourth proportional to 12,603.40, 18,905.10 and 12,473.80 is: 18,710.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,603.40 : 18,905.10 = 12,473.80 : x
  2. Step 2: Convert to fraction form
    12,603.40/18,905.10 = 12,473.80/x
  3. Step 3: Cross multiply
    12,603.40x = 18,905.10 × 12,473.80
  4. Step 4: Simplify right side
    12,603.40x = 235,818,436.38
  5. Step 5: Solve for x
    x = 235,818,436.38/12,603.40
  6. Step 6: Final answer
    x = 18,710.70

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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.