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Finding the Fourth Proportional to 13,405.81, 18,500.63 and 7,437.11

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Solution

The fourth proportional to 13,405.81, 18,500.63 and 7,437.11 is: 10,263.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,405.81 : 18,500.63 = 7,437.11 : x
  2. Step 2: Convert to fraction form
    13,405.81/18,500.63 = 7,437.11/x
  3. Step 3: Cross multiply
    13,405.81x = 18,500.63 × 7,437.11
  4. Step 4: Simplify right side
    13,405.81x = 137,591,220.38
  5. Step 5: Solve for x
    x = 137,591,220.38/13,405.81
  6. Step 6: Final answer
    x = 10,263.55

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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.