Home / 13,109.40-18,086.58-7,801.20

Finding the Fourth Proportional to 13,109.40, 18,086.58 and 7,801.20

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Solution

The fourth proportional to 13,109.40, 18,086.58 and 7,801.20 is: 10,763.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,109.40 : 18,086.58 = 7,801.20 : x
  2. Step 2: Convert to fraction form
    13,109.40/18,086.58 = 7,801.20/x
  3. Step 3: Cross multiply
    13,109.40x = 18,086.58 × 7,801.20
  4. Step 4: Simplify right side
    13,109.40x = 141,097,027.90
  5. Step 5: Solve for x
    x = 141,097,027.90/13,109.40
  6. Step 6: Final answer
    x = 10,763.04

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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.