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Finding the Fourth Proportional to 13,884.90, 20,833.02 and 7,316.88

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Solution

The fourth proportional to 13,884.90, 20,833.02 and 7,316.88 is: 10,978.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,884.90 : 20,833.02 = 7,316.88 : x
  2. Step 2: Convert to fraction form
    13,884.90/20,833.02 = 7,316.88/x
  3. Step 3: Cross multiply
    13,884.90x = 20,833.02 × 7,316.88
  4. Step 4: Simplify right side
    13,884.90x = 152,432,707.38
  5. Step 5: Solve for x
    x = 152,432,707.38/13,884.90
  6. Step 6: Final answer
    x = 10,978.31

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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.