Home / 21,039.57-29,036.02-12,090.64

Finding the Fourth Proportional to 21,039.57, 29,036.02 and 12,090.64

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Solution

The fourth proportional to 21,039.57, 29,036.02 and 12,090.64 is: 16,685.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,039.57 : 29,036.02 = 12,090.64 : x
  2. Step 2: Convert to fraction form
    21,039.57/29,036.02 = 12,090.64/x
  3. Step 3: Cross multiply
    21,039.57x = 29,036.02 × 12,090.64
  4. Step 4: Simplify right side
    21,039.57x = 351,063,949.90
  5. Step 5: Solve for x
    x = 351,063,949.90/21,039.57
  6. Step 6: Final answer
    x = 16,685.89

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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.