Home / 13,702.38-18,909.63-8,400.12

Finding the Fourth Proportional to 13,702.38, 18,909.63 and 8,400.12

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Solution

The fourth proportional to 13,702.38, 18,909.63 and 8,400.12 is: 11,592.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,702.38 : 18,909.63 = 8,400.12 : x
  2. Step 2: Convert to fraction form
    13,702.38/18,909.63 = 8,400.12/x
  3. Step 3: Cross multiply
    13,702.38x = 18,909.63 × 8,400.12
  4. Step 4: Simplify right side
    13,702.38x = 158,843,161.16
  5. Step 5: Solve for x
    x = 158,843,161.16/13,702.38
  6. Step 6: Final answer
    x = 11,592.38

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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.