Home / 10,638.60-15,938.70-9,409.80

Finding the Fourth Proportional to 10,638.60, 15,938.70 and 9,409.80

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Solution

The fourth proportional to 10,638.60, 15,938.70 and 9,409.80 is: 14,097.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,638.60 : 15,938.70 = 9,409.80 : x
  2. Step 2: Convert to fraction form
    10,638.60/15,938.70 = 9,409.80/x
  3. Step 3: Cross multiply
    10,638.60x = 15,938.70 × 9,409.80
  4. Step 4: Simplify right side
    10,638.60x = 149,979,979.26
  5. Step 5: Solve for x
    x = 149,979,979.26/10,638.60
  6. Step 6: Final answer
    x = 14,097.72

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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.