Home / 20,907.84-28,866.33-12,958.50

Finding the Fourth Proportional to 20,907.84, 28,866.33 and 12,958.50

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Solution

The fourth proportional to 20,907.84, 28,866.33 and 12,958.50 is: 17,891.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,907.84 : 28,866.33 = 12,958.50 : x
  2. Step 2: Convert to fraction form
    20,907.84/28,866.33 = 12,958.50/x
  3. Step 3: Cross multiply
    20,907.84x = 28,866.33 × 12,958.50
  4. Step 4: Simplify right side
    20,907.84x = 374,064,337.31
  5. Step 5: Solve for x
    x = 374,064,337.31/20,907.84
  6. Step 6: Final answer
    x = 17,891.10

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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.