Home / 12,118.79-16,718.47-7,080.75

Finding the Fourth Proportional to 12,118.79, 16,718.47 and 7,080.75

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Solution

The fourth proportional to 12,118.79, 16,718.47 and 7,080.75 is: 9,768.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,118.79 : 16,718.47 = 7,080.75 : x
  2. Step 2: Convert to fraction form
    12,118.79/16,718.47 = 7,080.75/x
  3. Step 3: Cross multiply
    12,118.79x = 16,718.47 × 7,080.75
  4. Step 4: Simplify right side
    12,118.79x = 118,379,302.03
  5. Step 5: Solve for x
    x = 118,379,302.03/12,118.79
  6. Step 6: Final answer
    x = 9,768.24

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Half scale
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Double scale
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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.