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Finding the Fourth Proportional to 7,170,911.91, 9,895,570.29 and 3,907,656.63

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Solution

The fourth proportional to 7,170,911.91, 9,895,570.29 and 3,907,656.63 is: 5,392,409.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,170,911.91 : 9,895,570.29 = 3,907,656.63 : x
  2. Step 2: Convert to fraction form
    7,170,911.91/9,895,570.29 = 3,907,656.63/x
  3. Step 3: Cross multiply
    7,170,911.91x = 9,895,570.29 × 3,907,656.63
  4. Step 4: Simplify right side
    7,170,911.91x = 38,668,490,851,349.52
  5. Step 5: Solve for x
    x = 38,668,490,851,349.52/7,170,911.91
  6. Step 6: Final answer
    x = 5,392,409.13

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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.