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Finding the Fourth Proportional to 20,483.68, 28,268.01 and 11,531.50

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Solution

The fourth proportional to 20,483.68, 28,268.01 and 11,531.50 is: 15,913.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,483.68 : 28,268.01 = 11,531.50 : x
  2. Step 2: Convert to fraction form
    20,483.68/28,268.01 = 11,531.50/x
  3. Step 3: Cross multiply
    20,483.68x = 28,268.01 × 11,531.50
  4. Step 4: Simplify right side
    20,483.68x = 325,972,557.32
  5. Step 5: Solve for x
    x = 325,972,557.32/20,483.68
  6. Step 6: Final answer
    x = 15,913.77

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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.