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Finding the Fourth Proportional to 28,807.79, 43,213.05 and 13,999.07

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Solution

The fourth proportional to 28,807.79, 43,213.05 and 13,999.07 is: 20,999.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,807.79 : 43,213.05 = 13,999.07 : x
  2. Step 2: Convert to fraction form
    28,807.79/43,213.05 = 13,999.07/x
  3. Step 3: Cross multiply
    28,807.79x = 43,213.05 × 13,999.07
  4. Step 4: Simplify right side
    28,807.79x = 604,942,511.86
  5. Step 5: Solve for x
    x = 604,942,511.86/28,807.79
  6. Step 6: Final answer
    x = 20,999.27

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1.5x scale

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.