Home / 20,929.90-28,883.49-11,369.98

Finding the Fourth Proportional to 20,929.90, 28,883.49 and 11,369.98

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Solution

The fourth proportional to 20,929.90, 28,883.49 and 11,369.98 is: 15,690.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.90 : 28,883.49 = 11,369.98 : x
  2. Step 2: Convert to fraction form
    20,929.90/28,883.49 = 11,369.98/x
  3. Step 3: Cross multiply
    20,929.90x = 28,883.49 × 11,369.98
  4. Step 4: Simplify right side
    20,929.90x = 328,404,615.86
  5. Step 5: Solve for x
    x = 328,404,615.86/20,929.90
  6. Step 6: Final answer
    x = 15,690.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.