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Finding the Fourth Proportional to 18,728,645.40, 28,045,728.90 and 14,949,509.40

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Solution

The fourth proportional to 18,728,645.40, 28,045,728.90 and 14,949,509.40 is: 22,386,557.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,728,645.40 : 28,045,728.90 = 14,949,509.40 : x
  2. Step 2: Convert to fraction form
    18,728,645.40/28,045,728.90 = 14,949,509.40/x
  3. Step 3: Cross multiply
    18,728,645.40x = 28,045,728.90 × 14,949,509.40
  4. Step 4: Simplify right side
    18,728,645.40x = 419,269,887,820,401.62
  5. Step 5: Solve for x
    x = 419,269,887,820,401.62/18,728,645.40
  6. Step 6: Final answer
    x = 22,386,557.00

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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.