Home / 20,405.61-30,613.56-9,880.68

Finding the Fourth Proportional to 20,405.61, 30,613.56 and 9,880.68

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Solution

The fourth proportional to 20,405.61, 30,613.56 and 9,880.68 is: 14,823.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405.61 : 30,613.56 = 9,880.68 : x
  2. Step 2: Convert to fraction form
    20,405.61/30,613.56 = 9,880.68/x
  3. Step 3: Cross multiply
    20,405.61x = 30,613.56 × 9,880.68
  4. Step 4: Simplify right side
    20,405.61x = 302,482,790.02
  5. Step 5: Solve for x
    x = 302,482,790.02/20,405.61
  6. Step 6: Final answer
    x = 14,823.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.