Home / 21,717.51-29,971.58-12,158.29

Finding the Fourth Proportional to 21,717.51, 29,971.58 and 12,158.29

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Solution

The fourth proportional to 21,717.51, 29,971.58 and 12,158.29 is: 16,779.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,717.51 : 29,971.58 = 12,158.29 : x
  2. Step 2: Convert to fraction form
    21,717.51/29,971.58 = 12,158.29/x
  3. Step 3: Cross multiply
    21,717.51x = 29,971.58 × 12,158.29
  4. Step 4: Simplify right side
    21,717.51x = 364,403,161.40
  5. Step 5: Solve for x
    x = 364,403,161.40/21,717.51
  6. Step 6: Final answer
    x = 16,779.23

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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.