Home / 30,971.75-42,749.45-18,229.02

Finding the Fourth Proportional to 30,971.75, 42,749.45 and 18,229.02

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Solution

The fourth proportional to 30,971.75, 42,749.45 and 18,229.02 is: 25,161.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,971.75 : 42,749.45 = 18,229.02 : x
  2. Step 2: Convert to fraction form
    30,971.75/42,749.45 = 18,229.02/x
  3. Step 3: Cross multiply
    30,971.75x = 42,749.45 × 18,229.02
  4. Step 4: Simplify right side
    30,971.75x = 779,280,624.61
  5. Step 5: Solve for x
    x = 779,280,624.61/30,971.75
  6. Step 6: Final answer
    x = 25,161.01

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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.