Home / 21,557.88-29,749.68-12,126.51

Finding the Fourth Proportional to 21,557.88, 29,749.68 and 12,126.51

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Solution

The fourth proportional to 21,557.88, 29,749.68 and 12,126.51 is: 16,734.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,557.88 : 29,749.68 = 12,126.51 : x
  2. Step 2: Convert to fraction form
    21,557.88/29,749.68 = 12,126.51/x
  3. Step 3: Cross multiply
    21,557.88x = 29,749.68 × 12,126.51
  4. Step 4: Simplify right side
    21,557.88x = 360,759,792.02
  5. Step 5: Solve for x
    x = 360,759,792.02/21,557.88
  6. Step 6: Final answer
    x = 16,734.47

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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.