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Finding the Fourth Proportional to 38,804.40, 53,549.88 and 21,809.10

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Solution

The fourth proportional to 38,804.40, 53,549.88 and 21,809.10 is: 30,096.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,804.40 : 53,549.88 = 21,809.10 : x
  2. Step 2: Convert to fraction form
    38,804.40/53,549.88 = 21,809.10/x
  3. Step 3: Cross multiply
    38,804.40x = 53,549.88 × 21,809.10
  4. Step 4: Simplify right side
    38,804.40x = 1,167,874,687.91
  5. Step 5: Solve for x
    x = 1,167,874,687.91/38,804.40
  6. Step 6: Final answer
    x = 30,096.45

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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.