Home / 20,438.36-28,205.71-12,484.16

Finding the Fourth Proportional to 20,438.36, 28,205.71 and 12,484.16

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Solution

The fourth proportional to 20,438.36, 28,205.71 and 12,484.16 is: 17,228.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.36 : 28,205.71 = 12,484.16 : x
  2. Step 2: Convert to fraction form
    20,438.36/28,205.71 = 12,484.16/x
  3. Step 3: Cross multiply
    20,438.36x = 28,205.71 × 12,484.16
  4. Step 4: Simplify right side
    20,438.36x = 352,124,424.31
  5. Step 5: Solve for x
    x = 352,124,424.31/20,438.36
  6. Step 6: Final answer
    x = 17,228.61

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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.