Home / 21,720,683.55-29,949,979.86-13,869,872.97

Finding the Fourth Proportional to 21,720,683.55, 29,949,979.86 and 13,869,872.97

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Solution

The fourth proportional to 21,720,683.55, 29,949,979.86 and 13,869,872.97 is: 19,124,739.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,720,683.55 : 29,949,979.86 = 13,869,872.97 : x
  2. Step 2: Convert to fraction form
    21,720,683.55/29,949,979.86 = 13,869,872.97/x
  3. Step 3: Cross multiply
    21,720,683.55x = 29,949,979.86 × 13,869,872.97
  4. Step 4: Simplify right side
    21,720,683.55x = 415,402,416,112,258.38
  5. Step 5: Solve for x
    x = 415,402,416,112,258.38/21,720,683.55
  6. Step 6: Final answer
    x = 19,124,739.57

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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.