Home / 21,128.02-29,157.06-12,174.01

Finding the Fourth Proportional to 21,128.02, 29,157.06 and 12,174.01

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Solution

The fourth proportional to 21,128.02, 29,157.06 and 12,174.01 is: 16,800.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,128.02 : 29,157.06 = 12,174.01 : x
  2. Step 2: Convert to fraction form
    21,128.02/29,157.06 = 12,174.01/x
  3. Step 3: Cross multiply
    21,128.02x = 29,157.06 × 12,174.01
  4. Step 4: Simplify right side
    21,128.02x = 354,958,340.01
  5. Step 5: Solve for x
    x = 354,958,340.01/21,128.02
  6. Step 6: Final answer
    x = 16,800.36

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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.