Home / 20,819.63-28,734.23-13,269.32

Finding the Fourth Proportional to 20,819.63, 28,734.23 and 13,269.32

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Solution

The fourth proportional to 20,819.63, 28,734.23 and 13,269.32 is: 18,313.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.63 : 28,734.23 = 13,269.32 : x
  2. Step 2: Convert to fraction form
    20,819.63/28,734.23 = 13,269.32/x
  3. Step 3: Cross multiply
    20,819.63x = 28,734.23 × 13,269.32
  4. Step 4: Simplify right side
    20,819.63x = 381,283,482.81
  5. Step 5: Solve for x
    x = 381,283,482.81/20,819.63
  6. Step 6: Final answer
    x = 18,313.66

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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.