Home / 30,653.28-42,290.64-20,049.12

Finding the Fourth Proportional to 30,653.28, 42,290.64 and 20,049.12

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Solution

The fourth proportional to 30,653.28, 42,290.64 and 20,049.12 is: 27,660.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,653.28 : 42,290.64 = 20,049.12 : x
  2. Step 2: Convert to fraction form
    30,653.28/42,290.64 = 20,049.12/x
  3. Step 3: Cross multiply
    30,653.28x = 42,290.64 × 20,049.12
  4. Step 4: Simplify right side
    30,653.28x = 847,890,116.24
  5. Step 5: Solve for x
    x = 847,890,116.24/30,653.28
  6. Step 6: Final answer
    x = 27,660.67

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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.