Home / 18,683.36-25,779.84-11,128.76

Finding the Fourth Proportional to 18,683.36, 25,779.84 and 11,128.76

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Solution

The fourth proportional to 18,683.36, 25,779.84 and 11,128.76 is: 15,355.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,683.36 : 25,779.84 = 11,128.76 : x
  2. Step 2: Convert to fraction form
    18,683.36/25,779.84 = 11,128.76/x
  3. Step 3: Cross multiply
    18,683.36x = 25,779.84 × 11,128.76
  4. Step 4: Simplify right side
    18,683.36x = 286,897,652.20
  5. Step 5: Solve for x
    x = 286,897,652.20/18,683.36
  6. Step 6: Final answer
    x = 15,355.78

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Half scale
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Double scale
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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.