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Finding the Fourth Proportional to 13,788.50, 20,690.51 and 7,463.21

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Solution

The fourth proportional to 13,788.50, 20,690.51 and 7,463.21 is: 11,199.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,788.50 : 20,690.51 = 7,463.21 : x
  2. Step 2: Convert to fraction form
    13,788.50/20,690.51 = 7,463.21/x
  3. Step 3: Cross multiply
    13,788.50x = 20,690.51 × 7,463.21
  4. Step 4: Simplify right side
    13,788.50x = 154,417,480.37
  5. Step 5: Solve for x
    x = 154,417,480.37/13,788.50
  6. Step 6: Final answer
    x = 11,199.01

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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.