Home / 12,379.16-17,085.60-9,685.01

Finding the Fourth Proportional to 12,379.16, 17,085.60 and 9,685.01

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Solution

The fourth proportional to 12,379.16, 17,085.60 and 9,685.01 is: 13,367.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,379.16 : 17,085.60 = 9,685.01 : x
  2. Step 2: Convert to fraction form
    12,379.16/17,085.60 = 9,685.01/x
  3. Step 3: Cross multiply
    12,379.16x = 17,085.60 × 9,685.01
  4. Step 4: Simplify right side
    12,379.16x = 165,474,206.86
  5. Step 5: Solve for x
    x = 165,474,206.86/12,379.16
  6. Step 6: Final answer
    x = 13,367.16

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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.