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Finding the Fourth Proportional to 38,577, 53,236.58 and 20,913

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Solution

The fourth proportional to 38,577, 53,236.58 and 20,913 is: 28,860.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,577 : 53,236.58 = 20,913 : x
  2. Step 2: Convert to fraction form
    38,577/53,236.58 = 20,913/x
  3. Step 3: Cross multiply
    38,577x = 53,236.58 × 20,913
  4. Step 4: Simplify right side
    38,577x = 1,113,336,597.54
  5. Step 5: Solve for x
    x = 1,113,336,597.54/38,577
  6. Step 6: Final answer
    x = 28,860.11

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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.