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Finding the Fourth Proportional to 18,941,085.72, 28,411,891.02 and 6,161,657.40

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Solution

The fourth proportional to 18,941,085.72, 28,411,891.02 and 6,161,657.40 is: 9,242,571.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,941,085.72 : 28,411,891.02 = 6,161,657.40 : x
  2. Step 2: Convert to fraction form
    18,941,085.72/28,411,891.02 = 6,161,657.40/x
  3. Step 3: Cross multiply
    18,941,085.72x = 28,411,891.02 × 6,161,657.40
  4. Step 4: Simplify right side
    18,941,085.72x = 175,064,338,551,376.56
  5. Step 5: Solve for x
    x = 175,064,338,551,376.56/18,941,085.72
  6. Step 6: Final answer
    x = 9,242,571.47

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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.