Home / 21,670.28-29,904.98-12,238.68

Finding the Fourth Proportional to 21,670.28, 29,904.98 and 12,238.68

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Solution

The fourth proportional to 21,670.28, 29,904.98 and 12,238.68 is: 16,889.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,670.28 : 29,904.98 = 12,238.68 : x
  2. Step 2: Convert to fraction form
    21,670.28/29,904.98 = 12,238.68/x
  3. Step 3: Cross multiply
    21,670.28x = 29,904.98 × 12,238.68
  4. Step 4: Simplify right side
    21,670.28x = 365,997,480.63
  5. Step 5: Solve for x
    x = 365,997,480.63/21,670.28
  6. Step 6: Final answer
    x = 16,889.37

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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.