Home / 38,640.19-53,320.43-21,643.10

Finding the Fourth Proportional to 38,640.19, 53,320.43 and 21,643.10

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Solution

The fourth proportional to 38,640.19, 53,320.43 and 21,643.10 is: 29,865.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,640.19 : 53,320.43 = 21,643.10 : x
  2. Step 2: Convert to fraction form
    38,640.19/53,320.43 = 21,643.10/x
  3. Step 3: Cross multiply
    38,640.19x = 53,320.43 × 21,643.10
  4. Step 4: Simplify right side
    38,640.19x = 1,154,019,264.25
  5. Step 5: Solve for x
    x = 1,154,019,264.25/38,640.19
  6. Step 6: Final answer
    x = 29,865.78

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Half scale
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Double scale
Find fourth proportional to 38,641.19, 53,321.81 and 21,644.10
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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.