Home / 15,485.98-21,372.06-8,774.68

Finding the Fourth Proportional to 15,485.98, 21,372.06 and 8,774.68

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Solution

The fourth proportional to 15,485.98, 21,372.06 and 8,774.68 is: 12,109.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.98 : 21,372.06 = 8,774.68 : x
  2. Step 2: Convert to fraction form
    15,485.98/21,372.06 = 8,774.68/x
  3. Step 3: Cross multiply
    15,485.98x = 21,372.06 × 8,774.68
  4. Step 4: Simplify right side
    15,485.98x = 187,532,987.44
  5. Step 5: Solve for x
    x = 187,532,987.44/15,485.98
  6. Step 6: Final answer
    x = 12,109.86

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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.