Home / 30,972.16-42,748.37-20,362.78

Finding the Fourth Proportional to 30,972.16, 42,748.37 and 20,362.78

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Solution

The fourth proportional to 30,972.16, 42,748.37 and 20,362.78 is: 28,105.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,972.16 : 42,748.37 = 20,362.78 : x
  2. Step 2: Convert to fraction form
    30,972.16/42,748.37 = 20,362.78/x
  3. Step 3: Cross multiply
    30,972.16x = 42,748.37 × 20,362.78
  4. Step 4: Simplify right side
    30,972.16x = 870,475,653.67
  5. Step 5: Solve for x
    x = 870,475,653.67/30,972.16
  6. Step 6: Final answer
    x = 28,105.10

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.