Home / 21,281,999.10-31,922,998.65-12,778,943.10

Finding the Fourth Proportional to 21,281,999.10, 31,922,998.65 and 12,778,943.10

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Solution

The fourth proportional to 21,281,999.10, 31,922,998.65 and 12,778,943.10 is: 19,168,414.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281,999.10 : 31,922,998.65 = 12,778,943.10 : x
  2. Step 2: Convert to fraction form
    21,281,999.10/31,922,998.65 = 12,778,943.10/x
  3. Step 3: Cross multiply
    21,281,999.10x = 31,922,998.65 × 12,778,943.10
  4. Step 4: Simplify right side
    21,281,999.10x = 407,942,183,329,726.81
  5. Step 5: Solve for x
    x = 407,942,183,329,726.81/21,281,999.10
  6. Step 6: Final answer
    x = 19,168,414.65

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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.