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Finding the Fourth Proportional to 13,415,999.40, 20,123,999.10 and 12,471,215.40

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Solution

The fourth proportional to 13,415,999.40, 20,123,999.10 and 12,471,215.40 is: 18,706,823.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,415,999.40 : 20,123,999.10 = 12,471,215.40 : x
  2. Step 2: Convert to fraction form
    13,415,999.40/20,123,999.10 = 12,471,215.40/x
  3. Step 3: Cross multiply
    13,415,999.40x = 20,123,999.10 × 12,471,215.40
  4. Step 4: Simplify right side
    13,415,999.40x = 250,970,727,485,506.16
  5. Step 5: Solve for x
    x = 250,970,727,485,506.16/13,415,999.40
  6. Step 6: Final answer
    x = 18,706,823.10

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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.