Home / 12,190.19-16,821.59-7,085.21

Finding the Fourth Proportional to 12,190.19, 16,821.59 and 7,085.21

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Solution

The fourth proportional to 12,190.19, 16,821.59 and 7,085.21 is: 9,777.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190.19 : 16,821.59 = 7,085.21 : x
  2. Step 2: Convert to fraction form
    12,190.19/16,821.59 = 7,085.21/x
  3. Step 3: Cross multiply
    12,190.19x = 16,821.59 × 7,085.21
  4. Step 4: Simplify right side
    12,190.19x = 119,184,378.15
  5. Step 5: Solve for x
    x = 119,184,378.15/12,190.19
  6. Step 6: Final answer
    x = 9,777.08

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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.