Home / 30,625.79-42,267.51-18,686.60

Finding the Fourth Proportional to 30,625.79, 42,267.51 and 18,686.60

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Solution

The fourth proportional to 30,625.79, 42,267.51 and 18,686.60 is: 25,789.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,625.79 : 42,267.51 = 18,686.60 : x
  2. Step 2: Convert to fraction form
    30,625.79/42,267.51 = 18,686.60/x
  3. Step 3: Cross multiply
    30,625.79x = 42,267.51 × 18,686.60
  4. Step 4: Simplify right side
    30,625.79x = 789,835,747.60
  5. Step 5: Solve for x
    x = 789,835,747.60/30,625.79
  6. Step 6: Final answer
    x = 25,789.89

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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.