Home / 15,109.80-20,852.52-9,141.72

Finding the Fourth Proportional to 15,109.80, 20,852.52 and 9,141.72

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Solution

The fourth proportional to 15,109.80, 20,852.52 and 9,141.72 is: 12,616.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,109.80 : 20,852.52 = 9,141.72 : x
  2. Step 2: Convert to fraction form
    15,109.80/20,852.52 = 9,141.72/x
  3. Step 3: Cross multiply
    15,109.80x = 20,852.52 × 9,141.72
  4. Step 4: Simplify right side
    15,109.80x = 190,627,899.13
  5. Step 5: Solve for x
    x = 190,627,899.13/15,109.80
  6. Step 6: Final answer
    x = 12,616.18

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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.