Home / 30,615.48-42,253.97-18,685.74

Finding the Fourth Proportional to 30,615.48, 42,253.97 and 18,685.74

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Solution

The fourth proportional to 30,615.48, 42,253.97 and 18,685.74 is: 25,789.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,615.48 : 42,253.97 = 18,685.74 : x
  2. Step 2: Convert to fraction form
    30,615.48/42,253.97 = 18,685.74/x
  3. Step 3: Cross multiply
    30,615.48x = 42,253.97 × 18,685.74
  4. Step 4: Simplify right side
    30,615.48x = 789,546,697.39
  5. Step 5: Solve for x
    x = 789,546,697.39/30,615.48
  6. Step 6: Final answer
    x = 25,789.13

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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.