Home / 20,478.89-30,730.26-8,631.93

Finding the Fourth Proportional to 20,478.89, 30,730.26 and 8,631.93

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Solution

The fourth proportional to 20,478.89, 30,730.26 and 8,631.93 is: 12,952.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.89 : 30,730.26 = 8,631.93 : x
  2. Step 2: Convert to fraction form
    20,478.89/30,730.26 = 8,631.93/x
  3. Step 3: Cross multiply
    20,478.89x = 30,730.26 × 8,631.93
  4. Step 4: Simplify right side
    20,478.89x = 265,261,453.20
  5. Step 5: Solve for x
    x = 265,261,453.20/20,478.89
  6. Step 6: Final answer
    x = 12,952.92

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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.