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Finding the Fourth Proportional to 13,918.42, 20,880.06 and 7,350.13

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Solution

The fourth proportional to 13,918.42, 20,880.06 and 7,350.13 is: 11,026.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,918.42 : 20,880.06 = 7,350.13 : x
  2. Step 2: Convert to fraction form
    13,918.42/20,880.06 = 7,350.13/x
  3. Step 3: Cross multiply
    13,918.42x = 20,880.06 × 7,350.13
  4. Step 4: Simplify right side
    13,918.42x = 153,471,155.41
  5. Step 5: Solve for x
    x = 153,471,155.41/13,918.42
  6. Step 6: Final answer
    x = 11,026.48

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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.