Home / 13,899.41-19,181.19-7,931.21

Finding the Fourth Proportional to 13,899.41, 19,181.19 and 7,931.21

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Solution

The fourth proportional to 13,899.41, 19,181.19 and 7,931.21 is: 10,945.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,899.41 : 19,181.19 = 7,931.21 : x
  2. Step 2: Convert to fraction form
    13,899.41/19,181.19 = 7,931.21/x
  3. Step 3: Cross multiply
    13,899.41x = 19,181.19 × 7,931.21
  4. Step 4: Simplify right side
    13,899.41x = 152,129,952.15
  5. Step 5: Solve for x
    x = 152,129,952.15/13,899.41
  6. Step 6: Final answer
    x = 10,945.07

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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.