Home / 20,645.60-28,497.64-12,147.24

Finding the Fourth Proportional to 20,645.60, 28,497.64 and 12,147.24

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Solution

The fourth proportional to 20,645.60, 28,497.64 and 12,147.24 is: 16,767.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.60 : 28,497.64 = 12,147.24 : x
  2. Step 2: Convert to fraction form
    20,645.60/28,497.64 = 12,147.24/x
  3. Step 3: Cross multiply
    20,645.60x = 28,497.64 × 12,147.24
  4. Step 4: Simplify right side
    20,645.60x = 346,167,672.51
  5. Step 5: Solve for x
    x = 346,167,672.51/20,645.60
  6. Step 6: Final answer
    x = 16,767.14

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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.