Home / 13,155.54-18,153.72-8,117.94

Finding the Fourth Proportional to 13,155.54, 18,153.72 and 8,117.94

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Solution

The fourth proportional to 13,155.54, 18,153.72 and 8,117.94 is: 11,202.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.54 : 18,153.72 = 8,117.94 : x
  2. Step 2: Convert to fraction form
    13,155.54/18,153.72 = 8,117.94/x
  3. Step 3: Cross multiply
    13,155.54x = 18,153.72 × 8,117.94
  4. Step 4: Simplify right side
    13,155.54x = 147,370,809.74
  5. Step 5: Solve for x
    x = 147,370,809.74/13,155.54
  6. Step 6: Final answer
    x = 11,202.19

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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.