Home / 13,317.80-19,976.70-5,420.30

Finding the Fourth Proportional to 13,317.80, 19,976.70 and 5,420.30

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Solution

The fourth proportional to 13,317.80, 19,976.70 and 5,420.30 is: 8,130.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,317.80 : 19,976.70 = 5,420.30 : x
  2. Step 2: Convert to fraction form
    13,317.80/19,976.70 = 5,420.30/x
  3. Step 3: Cross multiply
    13,317.80x = 19,976.70 × 5,420.30
  4. Step 4: Simplify right side
    13,317.80x = 108,279,707.01
  5. Step 5: Solve for x
    x = 108,279,707.01/13,317.80
  6. Step 6: Final answer
    x = 8,130.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.