Home / 30,821-42,620.46-29,428.61

Finding the Fourth Proportional to 30,821, 42,620.46 and 29,428.61

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Solution

The fourth proportional to 30,821, 42,620.46 and 29,428.61 is: 40,695.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,821 : 42,620.46 = 29,428.61 : x
  2. Step 2: Convert to fraction form
    30,821/42,620.46 = 29,428.61/x
  3. Step 3: Cross multiply
    30,821x = 42,620.46 × 29,428.61
  4. Step 4: Simplify right side
    30,821x = 1,254,260,895.36
  5. Step 5: Solve for x
    x = 1,254,260,895.36/30,821
  6. Step 6: Final answer
    x = 40,695.01

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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.