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Finding the Fourth Proportional to 20,000.76, 30,014.40 and 8,313.96

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Solution

The fourth proportional to 20,000.76, 30,014.40 and 8,313.96 is: 12,476.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,000.76 : 30,014.40 = 8,313.96 : x
  2. Step 2: Convert to fraction form
    20,000.76/30,014.40 = 8,313.96/x
  3. Step 3: Cross multiply
    20,000.76x = 30,014.40 × 8,313.96
  4. Step 4: Simplify right side
    20,000.76x = 249,538,521.02
  5. Step 5: Solve for x
    x = 249,538,521.02/20,000.76
  6. Step 6: Final answer
    x = 12,476.45

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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.