Home / 13,155.26-18,159.45-8,121.51

Finding the Fourth Proportional to 13,155.26, 18,159.45 and 8,121.51

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Solution

The fourth proportional to 13,155.26, 18,159.45 and 8,121.51 is: 11,210.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.26 : 18,159.45 = 8,121.51 : x
  2. Step 2: Convert to fraction form
    13,155.26/18,159.45 = 8,121.51/x
  3. Step 3: Cross multiply
    13,155.26x = 18,159.45 × 8,121.51
  4. Step 4: Simplify right side
    13,155.26x = 147,482,124.31
  5. Step 5: Solve for x
    x = 147,482,124.31/13,155.26
  6. Step 6: Final answer
    x = 11,210.89

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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.