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Finding the Fourth Proportional to 38,556, 53,217 and 21,798.72

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Solution

The fourth proportional to 38,556, 53,217 and 21,798.72 is: 30,087.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,556 : 53,217 = 21,798.72 : x
  2. Step 2: Convert to fraction form
    38,556/53,217 = 21,798.72/x
  3. Step 3: Cross multiply
    38,556x = 53,217 × 21,798.72
  4. Step 4: Simplify right side
    38,556x = 1,160,062,482.24
  5. Step 5: Solve for x
    x = 1,160,062,482.24/38,556
  6. Step 6: Final answer
    x = 30,087.73

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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.