Home / 21,660.19-29,884.29-12,708.07

Finding the Fourth Proportional to 21,660.19, 29,884.29 and 12,708.07

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Solution

The fourth proportional to 21,660.19, 29,884.29 and 12,708.07 is: 17,533.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,660.19 : 29,884.29 = 12,708.07 : x
  2. Step 2: Convert to fraction form
    21,660.19/29,884.29 = 12,708.07/x
  3. Step 3: Cross multiply
    21,660.19x = 29,884.29 × 12,708.07
  4. Step 4: Simplify right side
    21,660.19x = 379,771,649.22
  5. Step 5: Solve for x
    x = 379,771,649.22/21,660.19
  6. Step 6: Final answer
    x = 17,533.16

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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.