Home / 21,174.81-29,220.64-12,222.01

Finding the Fourth Proportional to 21,174.81, 29,220.64 and 12,222.01

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Solution

The fourth proportional to 21,174.81, 29,220.64 and 12,222.01 is: 16,866.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,174.81 : 29,220.64 = 12,222.01 : x
  2. Step 2: Convert to fraction form
    21,174.81/29,220.64 = 12,222.01/x
  3. Step 3: Cross multiply
    21,174.81x = 29,220.64 × 12,222.01
  4. Step 4: Simplify right side
    21,174.81x = 357,134,954.29
  5. Step 5: Solve for x
    x = 357,134,954.29/21,174.81
  6. Step 6: Final answer
    x = 16,866.03

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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.