Home / 38,690.70-53,378.08-28,643.19

Finding the Fourth Proportional to 38,690.70, 53,378.08 and 28,643.19

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Solution

The fourth proportional to 38,690.70, 53,378.08 and 28,643.19 is: 39,516.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,690.70 : 53,378.08 = 28,643.19 : x
  2. Step 2: Convert to fraction form
    38,690.70/53,378.08 = 28,643.19/x
  3. Step 3: Cross multiply
    38,690.70x = 53,378.08 × 28,643.19
  4. Step 4: Simplify right side
    38,690.70x = 1,528,918,487.28
  5. Step 5: Solve for x
    x = 1,528,918,487.28/38,690.70
  6. Step 6: Final answer
    x = 39,516.43

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Half scale
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Double scale
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Similar ratio
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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.