Home / 30,615.98-42,254.66-18,686.23

Finding the Fourth Proportional to 30,615.98, 42,254.66 and 18,686.23

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Solution

The fourth proportional to 30,615.98, 42,254.66 and 18,686.23 is: 25,789.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,615.98 : 42,254.66 = 18,686.23 : x
  2. Step 2: Convert to fraction form
    30,615.98/42,254.66 = 18,686.23/x
  3. Step 3: Cross multiply
    30,615.98x = 42,254.66 × 18,686.23
  4. Step 4: Simplify right side
    30,615.98x = 789,580,236.41
  5. Step 5: Solve for x
    x = 789,580,236.41/30,615.98
  6. Step 6: Final answer
    x = 25,789.81

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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.