Home / 30,890.61-42,603.66-18,945.54

Finding the Fourth Proportional to 30,890.61, 42,603.66 and 18,945.54

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Solution

The fourth proportional to 30,890.61, 42,603.66 and 18,945.54 is: 26,129.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,890.61 : 42,603.66 = 18,945.54 : x
  2. Step 2: Convert to fraction form
    30,890.61/42,603.66 = 18,945.54/x
  3. Step 3: Cross multiply
    30,890.61x = 42,603.66 × 18,945.54
  4. Step 4: Simplify right side
    30,890.61x = 807,149,344.68
  5. Step 5: Solve for x
    x = 807,149,344.68/30,890.61
  6. Step 6: Final answer
    x = 26,129.28

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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.