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Finding the Fourth Proportional to 18,118,903.20, 25,004,086.55 and 9,970,141.20

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Solution

The fourth proportional to 18,118,903.20, 25,004,086.55 and 9,970,141.20 is: 13,758,794.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,118,903.20 : 25,004,086.55 = 9,970,141.20 : x
  2. Step 2: Convert to fraction form
    18,118,903.20/25,004,086.55 = 9,970,141.20/x
  3. Step 3: Cross multiply
    18,118,903.20x = 25,004,086.55 × 9,970,141.20
  4. Step 4: Simplify right side
    18,118,903.20x = 249,294,273,480,520.84
  5. Step 5: Solve for x
    x = 249,294,273,480,520.84/18,118,903.20
  6. Step 6: Final answer
    x = 13,758,794.93

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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.