Home / 21,688.56-29,930.45-12,736.17

Finding the Fourth Proportional to 21,688.56, 29,930.45 and 12,736.17

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Solution

The fourth proportional to 21,688.56, 29,930.45 and 12,736.17 is: 17,576.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,688.56 : 29,930.45 = 12,736.17 : x
  2. Step 2: Convert to fraction form
    21,688.56/29,930.45 = 12,736.17/x
  3. Step 3: Cross multiply
    21,688.56x = 29,930.45 × 12,736.17
  4. Step 4: Simplify right side
    21,688.56x = 381,199,235.70
  5. Step 5: Solve for x
    x = 381,199,235.70/21,688.56
  6. Step 6: Final answer
    x = 17,576.05

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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.