Home / 15,396.37-21,245.18-8,681.60

Finding the Fourth Proportional to 15,396.37, 21,245.18 and 8,681.60

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Solution

The fourth proportional to 15,396.37, 21,245.18 and 8,681.60 is: 11,979.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,396.37 : 21,245.18 = 8,681.60 : x
  2. Step 2: Convert to fraction form
    15,396.37/21,245.18 = 8,681.60/x
  3. Step 3: Cross multiply
    15,396.37x = 21,245.18 × 8,681.60
  4. Step 4: Simplify right side
    15,396.37x = 184,442,154.69
  5. Step 5: Solve for x
    x = 184,442,154.69/15,396.37
  6. Step 6: Final answer
    x = 11,979.59

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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.