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Finding the Fourth Proportional to 18,793,979.40, 28,190,969.10 and 16,479,841.80

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Solution

The fourth proportional to 18,793,979.40, 28,190,969.10 and 16,479,841.80 is: 24,719,762.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,793,979.40 : 28,190,969.10 = 16,479,841.80 : x
  2. Step 2: Convert to fraction form
    18,793,979.40/28,190,969.10 = 16,479,841.80/x
  3. Step 3: Cross multiply
    18,793,979.40x = 28,190,969.10 × 16,479,841.80
  4. Step 4: Simplify right side
    18,793,979.40x = 464,582,710,956,688.44
  5. Step 5: Solve for x
    x = 464,582,710,956,688.44/18,793,979.40
  6. Step 6: Final answer
    x = 24,719,762.70

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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.