Home / 31,028.64-42,821.04-18,285.60

Finding the Fourth Proportional to 31,028.64, 42,821.04 and 18,285.60

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Solution

The fourth proportional to 31,028.64, 42,821.04 and 18,285.60 is: 25,235.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,028.64 : 42,821.04 = 18,285.60 : x
  2. Step 2: Convert to fraction form
    31,028.64/42,821.04 = 18,285.60/x
  3. Step 3: Cross multiply
    31,028.64x = 42,821.04 × 18,285.60
  4. Step 4: Simplify right side
    31,028.64x = 783,008,409.02
  5. Step 5: Solve for x
    x = 783,008,409.02/31,028.64
  6. Step 6: Final answer
    x = 25,235.02

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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.