Home / 21,531.09-29,713.86-12,577.35

Finding the Fourth Proportional to 21,531.09, 29,713.86 and 12,577.35

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Solution

The fourth proportional to 21,531.09, 29,713.86 and 12,577.35 is: 17,357.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,531.09 : 29,713.86 = 12,577.35 : x
  2. Step 2: Convert to fraction form
    21,531.09/29,713.86 = 12,577.35/x
  3. Step 3: Cross multiply
    21,531.09x = 29,713.86 × 12,577.35
  4. Step 4: Simplify right side
    21,531.09x = 373,721,617.07
  5. Step 5: Solve for x
    x = 373,721,617.07/21,531.09
  6. Step 6: Final answer
    x = 17,357.30

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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.