Home / 13,905.55-19,191.03-7,938.13

Finding the Fourth Proportional to 13,905.55, 19,191.03 and 7,938.13

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Solution

The fourth proportional to 13,905.55, 19,191.03 and 7,938.13 is: 10,955.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,905.55 : 19,191.03 = 7,938.13 : x
  2. Step 2: Convert to fraction form
    13,905.55/19,191.03 = 7,938.13/x
  3. Step 3: Cross multiply
    13,905.55x = 19,191.03 × 7,938.13
  4. Step 4: Simplify right side
    13,905.55x = 152,340,890.97
  5. Step 5: Solve for x
    x = 152,340,890.97/13,905.55
  6. Step 6: Final answer
    x = 10,955.40

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Double scale
Find fourth proportional to 13,906.55, 19,192.41 and 7,939.13
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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.