Home / 30,606.88-42,229.40-18,669.50

Finding the Fourth Proportional to 30,606.88, 42,229.40 and 18,669.50

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Solution

The fourth proportional to 30,606.88, 42,229.40 and 18,669.50 is: 25,758.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,606.88 : 42,229.40 = 18,669.50 : x
  2. Step 2: Convert to fraction form
    30,606.88/42,229.40 = 18,669.50/x
  3. Step 3: Cross multiply
    30,606.88x = 42,229.40 × 18,669.50
  4. Step 4: Simplify right side
    30,606.88x = 788,401,783.30
  5. Step 5: Solve for x
    x = 788,401,783.30/30,606.88
  6. Step 6: Final answer
    x = 25,758.97

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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.