Home / 13,710.41-18,919.19-7,889.71

Finding the Fourth Proportional to 13,710.41, 18,919.19 and 7,889.71

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Solution

The fourth proportional to 13,710.41, 18,919.19 and 7,889.71 is: 10,887.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,710.41 : 18,919.19 = 7,889.71 : x
  2. Step 2: Convert to fraction form
    13,710.41/18,919.19 = 7,889.71/x
  3. Step 3: Cross multiply
    13,710.41x = 18,919.19 × 7,889.71
  4. Step 4: Simplify right side
    13,710.41x = 149,266,909.38
  5. Step 5: Solve for x
    x = 149,266,909.38/13,710.41
  6. Step 6: Final answer
    x = 10,887.12

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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.