Home / 28,430.19-39,233.70-15,683.09

Finding the Fourth Proportional to 28,430.19, 39,233.70 and 15,683.09

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Solution

The fourth proportional to 28,430.19, 39,233.70 and 15,683.09 is: 21,642.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,430.19 : 39,233.70 = 15,683.09 : x
  2. Step 2: Convert to fraction form
    28,430.19/39,233.70 = 15,683.09/x
  3. Step 3: Cross multiply
    28,430.19x = 39,233.70 × 15,683.09
  4. Step 4: Simplify right side
    28,430.19x = 615,305,451.96
  5. Step 5: Solve for x
    x = 615,305,451.96/28,430.19
  6. Step 6: Final answer
    x = 21,642.68

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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.