Home / 20,462.18-28,238.10-12,078.68

Finding the Fourth Proportional to 20,462.18, 28,238.10 and 12,078.68

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Solution

The fourth proportional to 20,462.18, 28,238.10 and 12,078.68 is: 16,668.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,462.18 : 28,238.10 = 12,078.68 : x
  2. Step 2: Convert to fraction form
    20,462.18/28,238.10 = 12,078.68/x
  3. Step 3: Cross multiply
    20,462.18x = 28,238.10 × 12,078.68
  4. Step 4: Simplify right side
    20,462.18x = 341,078,973.71
  5. Step 5: Solve for x
    x = 341,078,973.71/20,462.18
  6. Step 6: Final answer
    x = 16,668.75

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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.