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Finding the Fourth Proportional to 30,358.55, 41,914.32 and 20,814.32

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Solution

The fourth proportional to 30,358.55, 41,914.32 and 20,814.32 is: 28,737.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,358.55 : 41,914.32 = 20,814.32 : x
  2. Step 2: Convert to fraction form
    30,358.55/41,914.32 = 20,814.32/x
  3. Step 3: Cross multiply
    30,358.55x = 41,914.32 × 20,814.32
  4. Step 4: Simplify right side
    30,358.55x = 872,418,069.06
  5. Step 5: Solve for x
    x = 872,418,069.06/30,358.55
  6. Step 6: Final answer
    x = 28,737.15

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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.