Home / 21,384.56-29,512.92-12,431.36

Finding the Fourth Proportional to 21,384.56, 29,512.92 and 12,431.36

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Solution

The fourth proportional to 21,384.56, 29,512.92 and 12,431.36 is: 17,156.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,384.56 : 29,512.92 = 12,431.36 : x
  2. Step 2: Convert to fraction form
    21,384.56/29,512.92 = 12,431.36/x
  3. Step 3: Cross multiply
    21,384.56x = 29,512.92 × 12,431.36
  4. Step 4: Simplify right side
    21,384.56x = 366,885,733.17
  5. Step 5: Solve for x
    x = 366,885,733.17/21,384.56
  6. Step 6: Final answer
    x = 17,156.57

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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.