Home / 21,091.93-29,110.05-13,136.72

Finding the Fourth Proportional to 21,091.93, 29,110.05 and 13,136.72

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Solution

The fourth proportional to 21,091.93, 29,110.05 and 13,136.72 is: 18,130.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,091.93 : 29,110.05 = 13,136.72 : x
  2. Step 2: Convert to fraction form
    21,091.93/29,110.05 = 13,136.72/x
  3. Step 3: Cross multiply
    21,091.93x = 29,110.05 × 13,136.72
  4. Step 4: Simplify right side
    21,091.93x = 382,410,430.49
  5. Step 5: Solve for x
    x = 382,410,430.49/21,091.93
  6. Step 6: Final answer
    x = 18,130.65

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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.