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Finding the Fourth Proportional to 12,603,615.20, 18,905,422.80 and 12,323,679.20

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Solution

The fourth proportional to 12,603,615.20, 18,905,422.80 and 12,323,679.20 is: 18,485,518.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,603,615.20 : 18,905,422.80 = 12,323,679.20 : x
  2. Step 2: Convert to fraction form
    12,603,615.20/18,905,422.80 = 12,323,679.20/x
  3. Step 3: Cross multiply
    12,603,615.20x = 18,905,422.80 × 12,323,679.20
  4. Step 4: Simplify right side
    12,603,615.20x = 232,984,365,727,565.75
  5. Step 5: Solve for x
    x = 232,984,365,727,565.75/12,603,615.20
  6. Step 6: Final answer
    x = 18,485,518.80

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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.