Home / 20,405.63-28,152.68-12,852.59

Finding the Fourth Proportional to 20,405.63, 28,152.68 and 12,852.59

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Solution

The fourth proportional to 20,405.63, 28,152.68 and 12,852.59 is: 17,732.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405.63 : 28,152.68 = 12,852.59 : x
  2. Step 2: Convert to fraction form
    20,405.63/28,152.68 = 12,852.59/x
  3. Step 3: Cross multiply
    20,405.63x = 28,152.68 × 12,852.59
  4. Step 4: Simplify right side
    20,405.63x = 361,834,648.41
  5. Step 5: Solve for x
    x = 361,834,648.41/20,405.63
  6. Step 6: Final answer
    x = 17,732.10

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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.