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Finding the Fourth Proportional to 13,203.88, 19,780.30 and 7,342.76

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Solution

The fourth proportional to 13,203.88, 19,780.30 and 7,342.76 is: 10,999.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,203.88 : 19,780.30 = 7,342.76 : x
  2. Step 2: Convert to fraction form
    13,203.88/19,780.30 = 7,342.76/x
  3. Step 3: Cross multiply
    13,203.88x = 19,780.30 × 7,342.76
  4. Step 4: Simplify right side
    13,203.88x = 145,241,995.63
  5. Step 5: Solve for x
    x = 145,241,995.63/13,203.88
  6. Step 6: Final answer
    x = 10,999.95

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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.