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Finding the Fourth Proportional to 14,684,898.61, 20,263,971.99 and 8,490,342.76

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Solution

The fourth proportional to 14,684,898.61, 20,263,971.99 and 8,490,342.76 is: 11,715,986.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,684,898.61 : 20,263,971.99 = 8,490,342.76 : x
  2. Step 2: Convert to fraction form
    14,684,898.61/20,263,971.99 = 8,490,342.76/x
  3. Step 3: Cross multiply
    14,684,898.61x = 20,263,971.99 × 8,490,342.76
  4. Step 4: Simplify right side
    14,684,898.61x = 172,048,067,969,303
  5. Step 5: Solve for x
    x = 172,048,067,969,303/14,684,898.61
  6. Step 6: Final answer
    x = 11,715,986.10

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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.