Home / 15,518.92-21,416.56-8,445.80

Finding the Fourth Proportional to 15,518.92, 21,416.56 and 8,445.80

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Solution

The fourth proportional to 15,518.92, 21,416.56 and 8,445.80 is: 11,655.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,518.92 : 21,416.56 = 8,445.80 : x
  2. Step 2: Convert to fraction form
    15,518.92/21,416.56 = 8,445.80/x
  3. Step 3: Cross multiply
    15,518.92x = 21,416.56 × 8,445.80
  4. Step 4: Simplify right side
    15,518.92x = 180,879,982.45
  5. Step 5: Solve for x
    x = 180,879,982.45/15,518.92
  6. Step 6: Final answer
    x = 11,655.45

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Half scale
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Double scale
Find fourth proportional to 15,519.92, 21,417.94 and 8,446.80
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.