Home / 28,680.86-43,032.32-13,888.64

Finding the Fourth Proportional to 28,680.86, 43,032.32 and 13,888.64

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Solution

The fourth proportional to 28,680.86, 43,032.32 and 13,888.64 is: 20,838.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,680.86 : 43,032.32 = 13,888.64 : x
  2. Step 2: Convert to fraction form
    28,680.86/43,032.32 = 13,888.64/x
  3. Step 3: Cross multiply
    28,680.86x = 43,032.32 × 13,888.64
  4. Step 4: Simplify right side
    28,680.86x = 597,660,116.24
  5. Step 5: Solve for x
    x = 597,660,116.24/28,680.86
  6. Step 6: Final answer
    x = 20,838.29

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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.