Home / 13,890.98-19,149.63-9,905.18

Finding the Fourth Proportional to 13,890.98, 19,149.63 and 9,905.18

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Solution

The fourth proportional to 13,890.98, 19,149.63 and 9,905.18 is: 13,654.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.98 : 19,149.63 = 9,905.18 : x
  2. Step 2: Convert to fraction form
    13,890.98/19,149.63 = 9,905.18/x
  3. Step 3: Cross multiply
    13,890.98x = 19,149.63 × 9,905.18
  4. Step 4: Simplify right side
    13,890.98x = 189,680,482.56
  5. Step 5: Solve for x
    x = 189,680,482.56/13,890.98
  6. Step 6: Final answer
    x = 13,654.94

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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.