Home / 21,298,901.40-31,915,842.42-12,645,962.44

Finding the Fourth Proportional to 21,298,901.40, 31,915,842.42 and 12,645,962.44

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Solution

The fourth proportional to 21,298,901.40, 31,915,842.42 and 12,645,962.44 is: 18,949,641.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,298,901.40 : 31,915,842.42 = 12,645,962.44 : x
  2. Step 2: Convert to fraction form
    21,298,901.40/31,915,842.42 = 12,645,962.44/x
  3. Step 3: Cross multiply
    21,298,901.40x = 31,915,842.42 × 12,645,962.44
  4. Step 4: Simplify right side
    21,298,901.40x = 403,606,544,484,278.69
  5. Step 5: Solve for x
    x = 403,606,544,484,278.69/21,298,901.40
  6. Step 6: Final answer
    x = 18,949,641.43

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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.