Home / 19,161.40-28,742.10-11,385.40

Finding the Fourth Proportional to 19,161.40, 28,742.10 and 11,385.40

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Solution

The fourth proportional to 19,161.40, 28,742.10 and 11,385.40 is: 17,078.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,161.40 : 28,742.10 = 11,385.40 : x
  2. Step 2: Convert to fraction form
    19,161.40/28,742.10 = 11,385.40/x
  3. Step 3: Cross multiply
    19,161.40x = 28,742.10 × 11,385.40
  4. Step 4: Simplify right side
    19,161.40x = 327,240,305.34
  5. Step 5: Solve for x
    x = 327,240,305.34/19,161.40
  6. Step 6: Final answer
    x = 17,078.10

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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.