Home / 20,430.33-30,645.54-6,390.44

Finding the Fourth Proportional to 20,430.33, 30,645.54 and 6,390.44

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Solution

The fourth proportional to 20,430.33, 30,645.54 and 6,390.44 is: 9,585.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.33 : 30,645.54 = 6,390.44 : x
  2. Step 2: Convert to fraction form
    20,430.33/30,645.54 = 6,390.44/x
  3. Step 3: Cross multiply
    20,430.33x = 30,645.54 × 6,390.44
  4. Step 4: Simplify right side
    20,430.33x = 195,838,618.71
  5. Step 5: Solve for x
    x = 195,838,618.71/20,430.33
  6. Step 6: Final answer
    x = 9,585.68

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.