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Finding the Fourth Proportional to 13,999.89, 20,995.28 and 5,113.18

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Solution

The fourth proportional to 13,999.89, 20,995.28 and 5,113.18 is: 7,668.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999.89 : 20,995.28 = 5,113.18 : x
  2. Step 2: Convert to fraction form
    13,999.89/20,995.28 = 5,113.18/x
  3. Step 3: Cross multiply
    13,999.89x = 20,995.28 × 5,113.18
  4. Step 4: Simplify right side
    13,999.89x = 107,352,533.16
  5. Step 5: Solve for x
    x = 107,352,533.16/13,999.89
  6. Step 6: Final answer
    x = 7,668.10

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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.