Home / 21,147.77-29,181.93-12,648.14

Finding the Fourth Proportional to 21,147.77, 29,181.93 and 12,648.14

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Solution

The fourth proportional to 21,147.77, 29,181.93 and 12,648.14 is: 17,453.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.77 : 29,181.93 = 12,648.14 : x
  2. Step 2: Convert to fraction form
    21,147.77/29,181.93 = 12,648.14/x
  3. Step 3: Cross multiply
    21,147.77x = 29,181.93 × 12,648.14
  4. Step 4: Simplify right side
    21,147.77x = 369,097,136.11
  5. Step 5: Solve for x
    x = 369,097,136.11/21,147.77
  6. Step 6: Final answer
    x = 17,453.24

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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.