Home / 15,518.28-21,415.23-8,444.73

Finding the Fourth Proportional to 15,518.28, 21,415.23 and 8,444.73

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Solution

The fourth proportional to 15,518.28, 21,415.23 and 8,444.73 is: 11,653.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,518.28 : 21,415.23 = 8,444.73 : x
  2. Step 2: Convert to fraction form
    15,518.28/21,415.23 = 8,444.73/x
  3. Step 3: Cross multiply
    15,518.28x = 21,415.23 × 8,444.73
  4. Step 4: Simplify right side
    15,518.28x = 180,845,835.24
  5. Step 5: Solve for x
    x = 180,845,835.24/15,518.28
  6. Step 6: Final answer
    x = 11,653.73

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Half scale
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Double scale
Find fourth proportional to 15,519.28, 21,416.61 and 8,445.73
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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.