Home / 21,272.26-29,359.02-12,779.11

Finding the Fourth Proportional to 21,272.26, 29,359.02 and 12,779.11

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Solution

The fourth proportional to 21,272.26, 29,359.02 and 12,779.11 is: 17,637.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,272.26 : 29,359.02 = 12,779.11 : x
  2. Step 2: Convert to fraction form
    21,272.26/29,359.02 = 12,779.11/x
  3. Step 3: Cross multiply
    21,272.26x = 29,359.02 × 12,779.11
  4. Step 4: Simplify right side
    21,272.26x = 375,182,146.07
  5. Step 5: Solve for x
    x = 375,182,146.07/21,272.26
  6. Step 6: Final answer
    x = 17,637.15

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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.