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Finding the Fourth Proportional to 38,603.40, 53,273.16 and 21,608.70

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Solution

The fourth proportional to 38,603.40, 53,273.16 and 21,608.70 is: 29,820.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,603.40 : 53,273.16 = 21,608.70 : x
  2. Step 2: Convert to fraction form
    38,603.40/53,273.16 = 21,608.70/x
  3. Step 3: Cross multiply
    38,603.40x = 53,273.16 × 21,608.70
  4. Step 4: Simplify right side
    38,603.40x = 1,151,163,732.49
  5. Step 5: Solve for x
    x = 1,151,163,732.49/38,603.40
  6. Step 6: Final answer
    x = 29,820.27

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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.