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Finding the Fourth Proportional to 13,999.48, 20,993.08 and 7,424.16

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Solution

The fourth proportional to 13,999.48, 20,993.08 and 7,424.16 is: 11,132.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999.48 : 20,993.08 = 7,424.16 : x
  2. Step 2: Convert to fraction form
    13,999.48/20,993.08 = 7,424.16/x
  3. Step 3: Cross multiply
    13,999.48x = 20,993.08 × 7,424.16
  4. Step 4: Simplify right side
    13,999.48x = 155,855,984.81
  5. Step 5: Solve for x
    x = 155,855,984.81/13,999.48
  6. Step 6: Final answer
    x = 11,132.98

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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.