Home / 20,465.36-28,249.66-12,916.61

Finding the Fourth Proportional to 20,465.36, 28,249.66 and 12,916.61

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Solution

The fourth proportional to 20,465.36, 28,249.66 and 12,916.61 is: 17,829.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,465.36 : 28,249.66 = 12,916.61 : x
  2. Step 2: Convert to fraction form
    20,465.36/28,249.66 = 12,916.61/x
  3. Step 3: Cross multiply
    20,465.36x = 28,249.66 × 12,916.61
  4. Step 4: Simplify right side
    20,465.36x = 364,889,980.59
  5. Step 5: Solve for x
    x = 364,889,980.59/20,465.36
  6. Step 6: Final answer
    x = 17,829.64

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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.