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Finding the Fourth Proportional to 13,383.70, 20,075.55 and 12,873.40

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Solution

The fourth proportional to 13,383.70, 20,075.55 and 12,873.40 is: 19,310.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,383.70 : 20,075.55 = 12,873.40 : x
  2. Step 2: Convert to fraction form
    13,383.70/20,075.55 = 12,873.40/x
  3. Step 3: Cross multiply
    13,383.70x = 20,075.55 × 12,873.40
  4. Step 4: Simplify right side
    13,383.70x = 258,440,585.37
  5. Step 5: Solve for x
    x = 258,440,585.37/13,383.70
  6. Step 6: Final answer
    x = 19,310.10

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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.