Home / 30,983.14-42,760.38-18,407.90

Finding the Fourth Proportional to 30,983.14, 42,760.38 and 18,407.90

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Solution

The fourth proportional to 30,983.14, 42,760.38 and 18,407.90 is: 25,405.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,983.14 : 42,760.38 = 18,407.90 : x
  2. Step 2: Convert to fraction form
    30,983.14/42,760.38 = 18,407.90/x
  3. Step 3: Cross multiply
    30,983.14x = 42,760.38 × 18,407.90
  4. Step 4: Simplify right side
    30,983.14x = 787,128,799.00
  5. Step 5: Solve for x
    x = 787,128,799.00/30,983.14
  6. Step 6: Final answer
    x = 25,405.07

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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.