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Finding the Fourth Proportional to 38,897.90, 53,679.30 and 22,130.90

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Solution

The fourth proportional to 38,897.90, 53,679.30 and 22,130.90 is: 30,540.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,897.90 : 53,679.30 = 22,130.90 : x
  2. Step 2: Convert to fraction form
    38,897.90/53,679.30 = 22,130.90/x
  3. Step 3: Cross multiply
    38,897.90x = 53,679.30 × 22,130.90
  4. Step 4: Simplify right side
    38,897.90x = 1,187,971,220.37
  5. Step 5: Solve for x
    x = 1,187,971,220.37/38,897.90
  6. Step 6: Final answer
    x = 30,540.75

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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.