Home / 13,201.60-19,780.80-9,702.40

Finding the Fourth Proportional to 13,201.60, 19,780.80 and 9,702.40

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Solution

The fourth proportional to 13,201.60, 19,780.80 and 9,702.40 is: 14,537.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,201.60 : 19,780.80 = 9,702.40 : x
  2. Step 2: Convert to fraction form
    13,201.60/19,780.80 = 9,702.40/x
  3. Step 3: Cross multiply
    13,201.60x = 19,780.80 × 9,702.40
  4. Step 4: Simplify right side
    13,201.60x = 191,921,233.92
  5. Step 5: Solve for x
    x = 191,921,233.92/13,201.60
  6. Step 6: Final answer
    x = 14,537.73

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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.