Home / 20,889.68-28,827.80-11,458.32

Finding the Fourth Proportional to 20,889.68, 28,827.80 and 11,458.32

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Solution

The fourth proportional to 20,889.68, 28,827.80 and 11,458.32 is: 15,812.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.68 : 28,827.80 = 11,458.32 : x
  2. Step 2: Convert to fraction form
    20,889.68/28,827.80 = 11,458.32/x
  3. Step 3: Cross multiply
    20,889.68x = 28,827.80 × 11,458.32
  4. Step 4: Simplify right side
    20,889.68x = 330,318,157.30
  5. Step 5: Solve for x
    x = 330,318,157.30/20,889.68
  6. Step 6: Final answer
    x = 15,812.50

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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.