Home / 21,071.63-29,079.13-11,511.48

Finding the Fourth Proportional to 21,071.63, 29,079.13 and 11,511.48

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Solution

The fourth proportional to 21,071.63, 29,079.13 and 11,511.48 is: 15,885.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,071.63 : 29,079.13 = 11,511.48 : x
  2. Step 2: Convert to fraction form
    21,071.63/29,079.13 = 11,511.48/x
  3. Step 3: Cross multiply
    21,071.63x = 29,079.13 × 11,511.48
  4. Step 4: Simplify right side
    21,071.63x = 334,743,770.21
  5. Step 5: Solve for x
    x = 334,743,770.21/21,071.63
  6. Step 6: Final answer
    x = 15,885.99

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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.