Home / 13,143.74-19,666.20-7,859.30

Finding the Fourth Proportional to 13,143.74, 19,666.20 and 7,859.30

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Solution

The fourth proportional to 13,143.74, 19,666.20 and 7,859.30 is: 11,759.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.74 : 19,666.20 = 7,859.30 : x
  2. Step 2: Convert to fraction form
    13,143.74/19,666.20 = 7,859.30/x
  3. Step 3: Cross multiply
    13,143.74x = 19,666.20 × 7,859.30
  4. Step 4: Simplify right side
    13,143.74x = 154,562,565.66
  5. Step 5: Solve for x
    x = 154,562,565.66/13,143.74
  6. Step 6: Final answer
    x = 11,759.41

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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.