Home / 20,880.56-28,813.38-11,926.28

Finding the Fourth Proportional to 20,880.56, 28,813.38 and 11,926.28

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Solution

The fourth proportional to 20,880.56, 28,813.38 and 11,926.28 is: 16,457.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.56 : 28,813.38 = 11,926.28 : x
  2. Step 2: Convert to fraction form
    20,880.56/28,813.38 = 11,926.28/x
  3. Step 3: Cross multiply
    20,880.56x = 28,813.38 × 11,926.28
  4. Step 4: Simplify right side
    20,880.56x = 343,636,437.63
  5. Step 5: Solve for x
    x = 343,636,437.63/20,880.56
  6. Step 6: Final answer
    x = 16,457.24

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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.