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Finding the Fourth Proportional to 13,405.40, 18,497.95 and 7,435.57

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Solution

The fourth proportional to 13,405.40, 18,497.95 and 7,435.57 is: 10,260.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,405.40 : 18,497.95 = 7,435.57 : x
  2. Step 2: Convert to fraction form
    13,405.40/18,497.95 = 7,435.57/x
  3. Step 3: Cross multiply
    13,405.40x = 18,497.95 × 7,435.57
  4. Step 4: Simplify right side
    13,405.40x = 137,542,764.90
  5. Step 5: Solve for x
    x = 137,542,764.90/13,405.40
  6. Step 6: Final answer
    x = 10,260.25

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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.