Home / 19,355.90-29,033.78-12,780.53

Finding the Fourth Proportional to 19,355.90, 29,033.78 and 12,780.53

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Solution

The fourth proportional to 19,355.90, 29,033.78 and 12,780.53 is: 19,170.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,355.90 : 29,033.78 = 12,780.53 : x
  2. Step 2: Convert to fraction form
    19,355.90/29,033.78 = 12,780.53/x
  3. Step 3: Cross multiply
    19,355.90x = 29,033.78 × 12,780.53
  4. Step 4: Simplify right side
    19,355.90x = 371,066,983.09
  5. Step 5: Solve for x
    x = 371,066,983.09/19,355.90
  6. Step 6: Final answer
    x = 19,170.74

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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.