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Finding the Fourth Proportional to 12,603.36, 18,890.72 and 9,809.40

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Solution

The fourth proportional to 12,603.36, 18,890.72 and 9,809.40 is: 14,702.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,603.36 : 18,890.72 = 9,809.40 : x
  2. Step 2: Convert to fraction form
    12,603.36/18,890.72 = 9,809.40/x
  3. Step 3: Cross multiply
    12,603.36x = 18,890.72 × 9,809.40
  4. Step 4: Simplify right side
    12,603.36x = 185,306,628.77
  5. Step 5: Solve for x
    x = 185,306,628.77/12,603.36
  6. Step 6: Final answer
    x = 14,702.95

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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.