Home / 15,431.58-21,295.54-8,357.98

Finding the Fourth Proportional to 15,431.58, 21,295.54 and 8,357.98

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Solution

The fourth proportional to 15,431.58, 21,295.54 and 8,357.98 is: 11,533.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,431.58 : 21,295.54 = 8,357.98 : x
  2. Step 2: Convert to fraction form
    15,431.58/21,295.54 = 8,357.98/x
  3. Step 3: Cross multiply
    15,431.58x = 21,295.54 × 8,357.98
  4. Step 4: Simplify right side
    15,431.58x = 177,987,697.41
  5. Step 5: Solve for x
    x = 177,987,697.41/15,431.58
  6. Step 6: Final answer
    x = 11,533.99

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