Home / 20,603.56-28,433.08-12,103.40

Finding the Fourth Proportional to 20,603.56, 28,433.08 and 12,103.40

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Solution

The fourth proportional to 20,603.56, 28,433.08 and 12,103.40 is: 16,702.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.56 : 28,433.08 = 12,103.40 : x
  2. Step 2: Convert to fraction form
    20,603.56/28,433.08 = 12,103.40/x
  3. Step 3: Cross multiply
    20,603.56x = 28,433.08 × 12,103.40
  4. Step 4: Simplify right side
    20,603.56x = 344,136,940.47
  5. Step 5: Solve for x
    x = 344,136,940.47/20,603.56
  6. Step 6: Final answer
    x = 16,702.79

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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.