Home / 30,940.13-42,708.45-18,364.88

Finding the Fourth Proportional to 30,940.13, 42,708.45 and 18,364.88

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Solution

The fourth proportional to 30,940.13, 42,708.45 and 18,364.88 is: 25,350.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,940.13 : 42,708.45 = 18,364.88 : x
  2. Step 2: Convert to fraction form
    30,940.13/42,708.45 = 18,364.88/x
  3. Step 3: Cross multiply
    30,940.13x = 42,708.45 × 18,364.88
  4. Step 4: Simplify right side
    30,940.13x = 784,335,345.69
  5. Step 5: Solve for x
    x = 784,335,345.69/30,940.13
  6. Step 6: Final answer
    x = 25,350.10

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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.