Home / 21,298,892.65-31,915,829.32-12,645,953.71

Finding the Fourth Proportional to 21,298,892.65, 31,915,829.32 and 12,645,953.71

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Solution

The fourth proportional to 21,298,892.65, 31,915,829.32 and 12,645,953.71 is: 18,949,628.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,298,892.65 : 31,915,829.32 = 12,645,953.71 : x
  2. Step 2: Convert to fraction form
    21,298,892.65/31,915,829.32 = 12,645,953.71/x
  3. Step 3: Cross multiply
    21,298,892.65x = 31,915,829.32 × 12,645,953.71
  4. Step 4: Simplify right side
    21,298,892.65x = 403,606,100,085,576.31
  5. Step 5: Solve for x
    x = 403,606,100,085,576.31/21,298,892.65
  6. Step 6: Final answer
    x = 18,949,628.36

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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.