Home / 19,810.78-29,709.88-6,480.69

Finding the Fourth Proportional to 19,810.78, 29,709.88 and 6,480.69

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Solution

The fourth proportional to 19,810.78, 29,709.88 and 6,480.69 is: 9,718.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,810.78 : 29,709.88 = 6,480.69 : x
  2. Step 2: Convert to fraction form
    19,810.78/29,709.88 = 6,480.69/x
  3. Step 3: Cross multiply
    19,810.78x = 29,709.88 × 6,480.69
  4. Step 4: Simplify right side
    19,810.78x = 192,540,522.22
  5. Step 5: Solve for x
    x = 192,540,522.22/19,810.78
  6. Step 6: Final answer
    x = 9,718.98

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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.