Home / 30,825.68-42,534.88-18,719.87

Finding the Fourth Proportional to 30,825.68, 42,534.88 and 18,719.87

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Solution

The fourth proportional to 30,825.68, 42,534.88 and 18,719.87 is: 25,830.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,825.68 : 42,534.88 = 18,719.87 : x
  2. Step 2: Convert to fraction form
    30,825.68/42,534.88 = 18,719.87/x
  3. Step 3: Cross multiply
    30,825.68x = 42,534.88 × 18,719.87
  4. Step 4: Simplify right side
    30,825.68x = 796,247,117.79
  5. Step 5: Solve for x
    x = 796,247,117.79/30,825.68
  6. Step 6: Final answer
    x = 25,830.65

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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.