Home / 13,702.72-18,909.84-7,415.08

Finding the Fourth Proportional to 13,702.72, 18,909.84 and 7,415.08

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Solution

The fourth proportional to 13,702.72, 18,909.84 and 7,415.08 is: 10,232.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,702.72 : 18,909.84 = 7,415.08 : x
  2. Step 2: Convert to fraction form
    13,702.72/18,909.84 = 7,415.08/x
  3. Step 3: Cross multiply
    13,702.72x = 18,909.84 × 7,415.08
  4. Step 4: Simplify right side
    13,702.72x = 140,217,976.39
  5. Step 5: Solve for x
    x = 140,217,976.39/13,702.72
  6. Step 6: Final answer
    x = 10,232.86

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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.