Home / 13,113.28-19,687.06-7,786.18

Finding the Fourth Proportional to 13,113.28, 19,687.06 and 7,786.18

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Solution

The fourth proportional to 13,113.28, 19,687.06 and 7,786.18 is: 11,689.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,113.28 : 19,687.06 = 7,786.18 : x
  2. Step 2: Convert to fraction form
    13,113.28/19,687.06 = 7,786.18/x
  3. Step 3: Cross multiply
    13,113.28x = 19,687.06 × 7,786.18
  4. Step 4: Simplify right side
    13,113.28x = 153,287,027.17
  5. Step 5: Solve for x
    x = 153,287,027.17/13,113.28
  6. Step 6: Final answer
    x = 11,689.45

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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.