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Finding the Fourth Proportional to 30,974,425.60, 46,461,638.40 and 18,881,190.40

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Solution

The fourth proportional to 30,974,425.60, 46,461,638.40 and 18,881,190.40 is: 28,321,785.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,974,425.60 : 46,461,638.40 = 18,881,190.40 : x
  2. Step 2: Convert to fraction form
    30,974,425.60/46,461,638.40 = 18,881,190.40/x
  3. Step 3: Cross multiply
    30,974,425.60x = 46,461,638.40 × 18,881,190.40
  4. Step 4: Simplify right side
    30,974,425.60x = 877,251,040,926,351.25
  5. Step 5: Solve for x
    x = 877,251,040,926,351.25/30,974,425.60
  6. Step 6: Final answer
    x = 28,321,785.60

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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.