Home / 30,672.61-42,403.68-30,391.94

Finding the Fourth Proportional to 30,672.61, 42,403.68 and 30,391.94

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Solution

The fourth proportional to 30,672.61, 42,403.68 and 30,391.94 is: 42,015.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,672.61 : 42,403.68 = 30,391.94 : x
  2. Step 2: Convert to fraction form
    30,672.61/42,403.68 = 30,391.94/x
  3. Step 3: Cross multiply
    30,672.61x = 42,403.68 × 30,391.94
  4. Step 4: Simplify right side
    30,672.61x = 1,288,730,204.35
  5. Step 5: Solve for x
    x = 1,288,730,204.35/30,672.61
  6. Step 6: Final answer
    x = 42,015.67

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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.