Home / 27,755.19-38,255.49-21,038.67

Finding the Fourth Proportional to 27,755.19, 38,255.49 and 21,038.67

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Solution

The fourth proportional to 27,755.19, 38,255.49 and 21,038.67 is: 28,997.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,755.19 : 38,255.49 = 21,038.67 : x
  2. Step 2: Convert to fraction form
    27,755.19/38,255.49 = 21,038.67/x
  3. Step 3: Cross multiply
    27,755.19x = 38,255.49 × 21,038.67
  4. Step 4: Simplify right side
    27,755.19x = 804,844,629.80
  5. Step 5: Solve for x
    x = 804,844,629.80/27,755.19
  6. Step 6: Final answer
    x = 28,997.99

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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.