Home / 30,720.80-42,396.09-17,296.67

Finding the Fourth Proportional to 30,720.80, 42,396.09 and 17,296.67

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Solution

The fourth proportional to 30,720.80, 42,396.09 and 17,296.67 is: 23,870.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,720.80 : 42,396.09 = 17,296.67 : x
  2. Step 2: Convert to fraction form
    30,720.80/42,396.09 = 17,296.67/x
  3. Step 3: Cross multiply
    30,720.80x = 42,396.09 × 17,296.67
  4. Step 4: Simplify right side
    30,720.80x = 733,311,178.02
  5. Step 5: Solve for x
    x = 733,311,178.02/30,720.80
  6. Step 6: Final answer
    x = 23,870.18

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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.