Home / 20,439.30-28,216.44-13,376.51

Finding the Fourth Proportional to 20,439.30, 28,216.44 and 13,376.51

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Solution

The fourth proportional to 20,439.30, 28,216.44 and 13,376.51 is: 18,466.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.30 : 28,216.44 = 13,376.51 : x
  2. Step 2: Convert to fraction form
    20,439.30/28,216.44 = 13,376.51/x
  3. Step 3: Cross multiply
    20,439.30x = 28,216.44 × 13,376.51
  4. Step 4: Simplify right side
    20,439.30x = 377,437,491.82
  5. Step 5: Solve for x
    x = 377,437,491.82/20,439.30
  6. Step 6: Final answer
    x = 18,466.26

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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.