Home / 15,482.80-21,364.32-12,819.52

Finding the Fourth Proportional to 15,482.80, 21,364.32 and 12,819.52

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Solution

The fourth proportional to 15,482.80, 21,364.32 and 12,819.52 is: 17,689.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,482.80 : 21,364.32 = 12,819.52 : x
  2. Step 2: Convert to fraction form
    15,482.80/21,364.32 = 12,819.52/x
  3. Step 3: Cross multiply
    15,482.80x = 21,364.32 × 12,819.52
  4. Step 4: Simplify right side
    15,482.80x = 273,880,327.53
  5. Step 5: Solve for x
    x = 273,880,327.53/15,482.80
  6. Step 6: Final answer
    x = 17,689.33

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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.