Home / 13,786.88-19,026.30-7,818.40

Finding the Fourth Proportional to 13,786.88, 19,026.30 and 7,818.40

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Solution

The fourth proportional to 13,786.88, 19,026.30 and 7,818.40 is: 10,789.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,786.88 : 19,026.30 = 7,818.40 : x
  2. Step 2: Convert to fraction form
    13,786.88/19,026.30 = 7,818.40/x
  3. Step 3: Cross multiply
    13,786.88x = 19,026.30 × 7,818.40
  4. Step 4: Simplify right side
    13,786.88x = 148,755,223.92
  5. Step 5: Solve for x
    x = 148,755,223.92/13,786.88
  6. Step 6: Final answer
    x = 10,789.62

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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.