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Finding the Fourth Proportional to 28,662,668.41, 42,990,782.92 and 7,916,055.95

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Solution

The fourth proportional to 28,662,668.41, 42,990,782.92 and 7,916,055.95 is: 11,873,194.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,662,668.41 : 42,990,782.92 = 7,916,055.95 : x
  2. Step 2: Convert to fraction form
    28,662,668.41/42,990,782.92 = 7,916,055.95/x
  3. Step 3: Cross multiply
    28,662,668.41x = 42,990,782.92 × 7,916,055.95
  4. Step 4: Simplify right side
    28,662,668.41x = 340,317,442,674,490.19
  5. Step 5: Solve for x
    x = 340,317,442,674,490.19/28,662,668.41
  6. Step 6: Final answer
    x = 11,873,194.70

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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.