Home / 21,749.40-30,012.74-12,795.17

Finding the Fourth Proportional to 21,749.40, 30,012.74 and 12,795.17

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Solution

The fourth proportional to 21,749.40, 30,012.74 and 12,795.17 is: 17,656.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,749.40 : 30,012.74 = 12,795.17 : x
  2. Step 2: Convert to fraction form
    21,749.40/30,012.74 = 12,795.17/x
  3. Step 3: Cross multiply
    21,749.40x = 30,012.74 × 12,795.17
  4. Step 4: Simplify right side
    21,749.40x = 384,017,896.43
  5. Step 5: Solve for x
    x = 384,017,896.43/21,749.40
  6. Step 6: Final answer
    x = 17,656.48

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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.