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Finding the Fourth Proportional to 50,509.36, 69,688.92 and 28,999

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Solution

The fourth proportional to 50,509.36, 69,688.92 and 28,999 is: 40,010.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,509.36 : 69,688.92 = 28,999 : x
  2. Step 2: Convert to fraction form
    50,509.36/69,688.92 = 28,999/x
  3. Step 3: Cross multiply
    50,509.36x = 69,688.92 × 28,999
  4. Step 4: Simplify right side
    50,509.36x = 2,020,908,991.08
  5. Step 5: Solve for x
    x = 2,020,908,991.08/50,509.36
  6. Step 6: Final answer
    x = 40,010.58

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1.5x scale

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.