Home / 13,991.28-19,308.30-7,618.20

Finding the Fourth Proportional to 13,991.28, 19,308.30 and 7,618.20

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Solution

The fourth proportional to 13,991.28, 19,308.30 and 7,618.20 is: 10,513.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,991.28 : 19,308.30 = 7,618.20 : x
  2. Step 2: Convert to fraction form
    13,991.28/19,308.30 = 7,618.20/x
  3. Step 3: Cross multiply
    13,991.28x = 19,308.30 × 7,618.20
  4. Step 4: Simplify right side
    13,991.28x = 147,094,491.06
  5. Step 5: Solve for x
    x = 147,094,491.06/13,991.28
  6. Step 6: Final answer
    x = 10,513.30

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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.