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Finding the Fourth Proportional to 38,681.19, 53,378.51 and 21,914.19

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Solution

The fourth proportional to 38,681.19, 53,378.51 and 21,914.19 is: 30,240.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,681.19 : 53,378.51 = 21,914.19 : x
  2. Step 2: Convert to fraction form
    38,681.19/53,378.51 = 21,914.19/x
  3. Step 3: Cross multiply
    38,681.19x = 53,378.51 × 21,914.19
  4. Step 4: Simplify right side
    38,681.19x = 1,169,746,810.06
  5. Step 5: Solve for x
    x = 1,169,746,810.06/38,681.19
  6. Step 6: Final answer
    x = 30,240.71

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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.