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Finding the Fourth Proportional to 13,872,475.80, 20,808,713.70 and 13,305,605.40

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Solution

The fourth proportional to 13,872,475.80, 20,808,713.70 and 13,305,605.40 is: 19,958,408.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,872,475.80 : 20,808,713.70 = 13,305,605.40 : x
  2. Step 2: Convert to fraction form
    13,872,475.80/20,808,713.70 = 13,305,605.40/x
  3. Step 3: Cross multiply
    13,872,475.80x = 20,808,713.70 × 13,305,605.40
  4. Step 4: Simplify right side
    13,872,475.80x = 276,872,533,373,773.97
  5. Step 5: Solve for x
    x = 276,872,533,373,773.97/13,872,475.80
  6. Step 6: Final answer
    x = 19,958,408.10

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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.