Home / 30,894.16-42,631.62-20,836.24

Finding the Fourth Proportional to 30,894.16, 42,631.62 and 20,836.24

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Solution

The fourth proportional to 30,894.16, 42,631.62 and 20,836.24 is: 28,752.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,894.16 : 42,631.62 = 20,836.24 : x
  2. Step 2: Convert to fraction form
    30,894.16/42,631.62 = 20,836.24/x
  3. Step 3: Cross multiply
    30,894.16x = 42,631.62 × 20,836.24
  4. Step 4: Simplify right side
    30,894.16x = 888,282,481.19
  5. Step 5: Solve for x
    x = 888,282,481.19/30,894.16
  6. Step 6: Final answer
    x = 28,752.44

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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.