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Finding the Fourth Proportional to 19,215, 26,516.70 and 10,383

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Solution

The fourth proportional to 19,215, 26,516.70 and 10,383 is: 14,328.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,215 : 26,516.70 = 10,383 : x
  2. Step 2: Convert to fraction form
    19,215/26,516.70 = 10,383/x
  3. Step 3: Cross multiply
    19,215x = 26,516.70 × 10,383
  4. Step 4: Simplify right side
    19,215x = 275,322,896.10
  5. Step 5: Solve for x
    x = 275,322,896.10/19,215
  6. Step 6: Final answer
    x = 14,328.54

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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.