Home / 21,298,894.90-31,915,832.67-12,645,955.94

Finding the Fourth Proportional to 21,298,894.90, 31,915,832.67 and 12,645,955.94

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Solution

The fourth proportional to 21,298,894.90, 31,915,832.67 and 12,645,955.94 is: 18,949,631.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,298,894.90 : 31,915,832.67 = 12,645,955.94 : x
  2. Step 2: Convert to fraction form
    21,298,894.90/31,915,832.67 = 12,645,955.94/x
  3. Step 3: Cross multiply
    21,298,894.90x = 31,915,832.67 × 12,645,955.94
  4. Step 4: Simplify right side
    21,298,894.90x = 403,606,213,733,232.56
  5. Step 5: Solve for x
    x = 403,606,213,733,232.56/21,298,894.90
  6. Step 6: Final answer
    x = 18,949,631.69

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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.