Home / 30,660.60-42,294.30-19,310.57

Finding the Fourth Proportional to 30,660.60, 42,294.30 and 19,310.57

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Solution

The fourth proportional to 30,660.60, 42,294.30 and 19,310.57 is: 26,637.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,660.60 : 42,294.30 = 19,310.57 : x
  2. Step 2: Convert to fraction form
    30,660.60/42,294.30 = 19,310.57/x
  3. Step 3: Cross multiply
    30,660.60x = 42,294.30 × 19,310.57
  4. Step 4: Simplify right side
    30,660.60x = 816,726,829.28
  5. Step 5: Solve for x
    x = 816,726,829.28/30,660.60
  6. Step 6: Final answer
    x = 26,637.67

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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.