Home / 28,178,909,401.41-38,886,919,992.99-15,491,860,923.69

Finding the Fourth Proportional to 28,178,909,401.41, 38,886,919,992.99 and 15,491,860,923.69

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Solution

The fourth proportional to 28,178,909,401.41, 38,886,919,992.99 and 15,491,860,923.69 is: 21,378,781,829.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,178,909,401.41 : 38,886,919,992.99 = 15,491,860,923.69 : x
  2. Step 2: Convert to fraction form
    28,178,909,401.41/38,886,919,992.99 = 15,491,860,923.69/x
  3. Step 3: Cross multiply
    28,178,909,401.41x = 38,886,919,992.99 × 15,491,860,923.69
  4. Step 4: Simplify right side
    28,178,909,401.41x = 602,430,756,282,061,160,448
  5. Step 5: Solve for x
    x = 602,430,756,282,061,160,448/28,178,909,401.41
  6. Step 6: Final answer
    x = 21,378,781,829.36

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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.