Home / 21,140.06-29,176.38-12,185.80

Finding the Fourth Proportional to 21,140.06, 29,176.38 and 12,185.80

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Solution

The fourth proportional to 21,140.06, 29,176.38 and 12,185.80 is: 16,818.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.06 : 29,176.38 = 12,185.80 : x
  2. Step 2: Convert to fraction form
    21,140.06/29,176.38 = 12,185.80/x
  3. Step 3: Cross multiply
    21,140.06x = 29,176.38 × 12,185.80
  4. Step 4: Simplify right side
    21,140.06x = 355,537,458.46
  5. Step 5: Solve for x
    x = 355,537,458.46/21,140.06
  6. Step 6: Final answer
    x = 16,818.19

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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.