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Finding the Fourth Proportional to 13,894,865.64, 19,175,978.34 and 8,742,643.56

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Solution

The fourth proportional to 13,894,865.64, 19,175,978.34 and 8,742,643.56 is: 12,065,517.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,894,865.64 : 19,175,978.34 = 8,742,643.56 : x
  2. Step 2: Convert to fraction form
    13,894,865.64/19,175,978.34 = 8,742,643.56/x
  3. Step 3: Cross multiply
    13,894,865.64x = 19,175,978.34 × 8,742,643.56
  4. Step 4: Simplify right side
    13,894,865.64x = 167,648,743,540,900.50
  5. Step 5: Solve for x
    x = 167,648,743,540,900.50/13,894,865.64
  6. Step 6: Final answer
    x = 12,065,517.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.