Home / 21,512.78-29,688.04-11,953.56

Finding the Fourth Proportional to 21,512.78, 29,688.04 and 11,953.56

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Solution

The fourth proportional to 21,512.78, 29,688.04 and 11,953.56 is: 16,496.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,512.78 : 29,688.04 = 11,953.56 : x
  2. Step 2: Convert to fraction form
    21,512.78/29,688.04 = 11,953.56/x
  3. Step 3: Cross multiply
    21,512.78x = 29,688.04 × 11,953.56
  4. Step 4: Simplify right side
    21,512.78x = 354,877,767.42
  5. Step 5: Solve for x
    x = 354,877,767.42/21,512.78
  6. Step 6: Final answer
    x = 16,496.14

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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.