Home / 30,975.44-42,743.88-18,407.12

Finding the Fourth Proportional to 30,975.44, 42,743.88 and 18,407.12

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Solution

The fourth proportional to 30,975.44, 42,743.88 and 18,407.12 is: 25,400.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,975.44 : 42,743.88 = 18,407.12 : x
  2. Step 2: Convert to fraction form
    30,975.44/42,743.88 = 18,407.12/x
  3. Step 3: Cross multiply
    30,975.44x = 42,743.88 × 18,407.12
  4. Step 4: Simplify right side
    30,975.44x = 786,791,728.43
  5. Step 5: Solve for x
    x = 786,791,728.43/30,975.44
  6. Step 6: Final answer
    x = 25,400.50

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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.