Home / 13,138.40-19,707.60-11,842.40

Finding the Fourth Proportional to 13,138.40, 19,707.60 and 11,842.40

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Solution

The fourth proportional to 13,138.40, 19,707.60 and 11,842.40 is: 17,763.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.40 : 19,707.60 = 11,842.40 : x
  2. Step 2: Convert to fraction form
    13,138.40/19,707.60 = 11,842.40/x
  3. Step 3: Cross multiply
    13,138.40x = 19,707.60 × 11,842.40
  4. Step 4: Simplify right side
    13,138.40x = 233,385,282.24
  5. Step 5: Solve for x
    x = 233,385,282.24/13,138.40
  6. Step 6: Final answer
    x = 17,763.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.