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Finding the Fourth Proportional to 38,806.17, 53,551.80 and 21,579.60

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Solution

The fourth proportional to 38,806.17, 53,551.80 and 21,579.60 is: 29,779.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,806.17 : 53,551.80 = 21,579.60 : x
  2. Step 2: Convert to fraction form
    38,806.17/53,551.80 = 21,579.60/x
  3. Step 3: Cross multiply
    38,806.17x = 53,551.80 × 21,579.60
  4. Step 4: Simplify right side
    38,806.17x = 1,155,626,423.28
  5. Step 5: Solve for x
    x = 1,155,626,423.28/38,806.17
  6. Step 6: Final answer
    x = 29,779.45

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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.