Home / 19,428.63-29,099.10-13,611.21

Finding the Fourth Proportional to 19,428.63, 29,099.10 and 13,611.21

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Solution

The fourth proportional to 19,428.63, 29,099.10 and 13,611.21 is: 20,386.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,428.63 : 29,099.10 = 13,611.21 : x
  2. Step 2: Convert to fraction form
    19,428.63/29,099.10 = 13,611.21/x
  3. Step 3: Cross multiply
    19,428.63x = 29,099.10 × 13,611.21
  4. Step 4: Simplify right side
    19,428.63x = 396,073,960.91
  5. Step 5: Solve for x
    x = 396,073,960.91/19,428.63
  6. Step 6: Final answer
    x = 20,386.10

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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.