Home / 19,217.40-28,869.30-13,385.40

Finding the Fourth Proportional to 19,217.40, 28,869.30 and 13,385.40

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Solution

The fourth proportional to 19,217.40, 28,869.30 and 13,385.40 is: 20,108.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,217.40 : 28,869.30 = 13,385.40 : x
  2. Step 2: Convert to fraction form
    19,217.40/28,869.30 = 13,385.40/x
  3. Step 3: Cross multiply
    19,217.40x = 28,869.30 × 13,385.40
  4. Step 4: Simplify right side
    19,217.40x = 386,427,128.22
  5. Step 5: Solve for x
    x = 386,427,128.22/19,217.40
  6. Step 6: Final answer
    x = 20,108.19

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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.