Home / 13,936.60-20,921.10-7,359.40

Finding the Fourth Proportional to 13,936.60, 20,921.10 and 7,359.40

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Solution

The fourth proportional to 13,936.60, 20,921.10 and 7,359.40 is: 11,047.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,936.60 : 20,921.10 = 7,359.40 : x
  2. Step 2: Convert to fraction form
    13,936.60/20,921.10 = 7,359.40/x
  3. Step 3: Cross multiply
    13,936.60x = 20,921.10 × 7,359.40
  4. Step 4: Simplify right side
    13,936.60x = 153,966,743.34
  5. Step 5: Solve for x
    x = 153,966,743.34/13,936.60
  6. Step 6: Final answer
    x = 11,047.65

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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.