Home / 13,709.81-18,919.56-7,422.18

Finding the Fourth Proportional to 13,709.81, 18,919.56 and 7,422.18

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Solution

The fourth proportional to 13,709.81, 18,919.56 and 7,422.18 is: 10,242.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,709.81 : 18,919.56 = 7,422.18 : x
  2. Step 2: Convert to fraction form
    13,709.81/18,919.56 = 7,422.18/x
  3. Step 3: Cross multiply
    13,709.81x = 18,919.56 × 7,422.18
  4. Step 4: Simplify right side
    13,709.81x = 140,424,379.84
  5. Step 5: Solve for x
    x = 140,424,379.84/13,709.81
  6. Step 6: Final answer
    x = 10,242.62

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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.