Home / 30,828.29-42,543.89-18,724.68

Finding the Fourth Proportional to 30,828.29, 42,543.89 and 18,724.68

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Solution

The fourth proportional to 30,828.29, 42,543.89 and 18,724.68 is: 25,840.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,828.29 : 42,543.89 = 18,724.68 : x
  2. Step 2: Convert to fraction form
    30,828.29/42,543.89 = 18,724.68/x
  3. Step 3: Cross multiply
    30,828.29x = 42,543.89 × 18,724.68
  4. Step 4: Simplify right side
    30,828.29x = 796,620,632.58
  5. Step 5: Solve for x
    x = 796,620,632.58/30,828.29
  6. Step 6: Final answer
    x = 25,840.58

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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.