Home / 13,339.80-18,409.10-7,371.45

Finding the Fourth Proportional to 13,339.80, 18,409.10 and 7,371.45

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Solution

The fourth proportional to 13,339.80, 18,409.10 and 7,371.45 is: 10,172.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,339.80 : 18,409.10 = 7,371.45 : x
  2. Step 2: Convert to fraction form
    13,339.80/18,409.10 = 7,371.45/x
  3. Step 3: Cross multiply
    13,339.80x = 18,409.10 × 7,371.45
  4. Step 4: Simplify right side
    13,339.80x = 135,701,723.34
  5. Step 5: Solve for x
    x = 135,701,723.34/13,339.80
  6. Step 6: Final answer
    x = 10,172.70

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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.