Home / 21,298,894.40-31,915,831.92-12,645,955.44

Finding the Fourth Proportional to 21,298,894.40, 31,915,831.92 and 12,645,955.44

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Solution

The fourth proportional to 21,298,894.40, 31,915,831.92 and 12,645,955.44 is: 18,949,630.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,298,894.40 : 31,915,831.92 = 12,645,955.44 : x
  2. Step 2: Convert to fraction form
    21,298,894.40/31,915,831.92 = 12,645,955.44/x
  3. Step 3: Cross multiply
    21,298,894.40x = 31,915,831.92 × 12,645,955.44
  4. Step 4: Simplify right side
    21,298,894.40x = 403,606,188,290,849.62
  5. Step 5: Solve for x
    x = 403,606,188,290,849.62/21,298,894.40
  6. Step 6: Final answer
    x = 18,949,630.94

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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.