Home / 20,421.34-28,184.48-12,468.18

Finding the Fourth Proportional to 20,421.34, 28,184.48 and 12,468.18

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Solution

The fourth proportional to 20,421.34, 28,184.48 and 12,468.18 is: 17,207.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421.34 : 28,184.48 = 12,468.18 : x
  2. Step 2: Convert to fraction form
    20,421.34/28,184.48 = 12,468.18/x
  3. Step 3: Cross multiply
    20,421.34x = 28,184.48 × 12,468.18
  4. Step 4: Simplify right side
    20,421.34x = 351,409,169.85
  5. Step 5: Solve for x
    x = 351,409,169.85/20,421.34
  6. Step 6: Final answer
    x = 17,207.94

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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.