Home / 30,904.72-42,645.36-18,968.56

Finding the Fourth Proportional to 30,904.72, 42,645.36 and 18,968.56

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Solution

The fourth proportional to 30,904.72, 42,645.36 and 18,968.56 is: 26,174.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,904.72 : 42,645.36 = 18,968.56 : x
  2. Step 2: Convert to fraction form
    30,904.72/42,645.36 = 18,968.56/x
  3. Step 3: Cross multiply
    30,904.72x = 42,645.36 × 18,968.56
  4. Step 4: Simplify right side
    30,904.72x = 808,921,069.88
  5. Step 5: Solve for x
    x = 808,921,069.88/30,904.72
  6. Step 6: Final answer
    x = 26,174.68

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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.