Home / 20,924.78-28,876.50-11,364.71

Finding the Fourth Proportional to 20,924.78, 28,876.50 and 11,364.71

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Solution

The fourth proportional to 20,924.78, 28,876.50 and 11,364.71 is: 15,683.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,924.78 : 28,876.50 = 11,364.71 : x
  2. Step 2: Convert to fraction form
    20,924.78/28,876.50 = 11,364.71/x
  3. Step 3: Cross multiply
    20,924.78x = 28,876.50 × 11,364.71
  4. Step 4: Simplify right side
    20,924.78x = 328,172,903.93
  5. Step 5: Solve for x
    x = 328,172,903.93/20,924.78
  6. Step 6: Final answer
    x = 15,683.46

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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.