Home / 13,355.18-18,429.82-7,386.70

Finding the Fourth Proportional to 13,355.18, 18,429.82 and 7,386.70

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Solution

The fourth proportional to 13,355.18, 18,429.82 and 7,386.70 is: 10,193.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,355.18 : 18,429.82 = 7,386.70 : x
  2. Step 2: Convert to fraction form
    13,355.18/18,429.82 = 7,386.70/x
  3. Step 3: Cross multiply
    13,355.18x = 18,429.82 × 7,386.70
  4. Step 4: Simplify right side
    13,355.18x = 136,135,551.39
  5. Step 5: Solve for x
    x = 136,135,551.39/13,355.18
  6. Step 6: Final answer
    x = 10,193.46

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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.