Home / 15,530.24-21,431.87-8,456.67

Finding the Fourth Proportional to 15,530.24, 21,431.87 and 8,456.67

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Solution

The fourth proportional to 15,530.24, 21,431.87 and 8,456.67 is: 11,670.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,530.24 : 21,431.87 = 8,456.67 : x
  2. Step 2: Convert to fraction form
    15,530.24/21,431.87 = 8,456.67/x
  3. Step 3: Cross multiply
    15,530.24x = 21,431.87 × 8,456.67
  4. Step 4: Simplify right side
    15,530.24x = 181,242,209.79
  5. Step 5: Solve for x
    x = 181,242,209.79/15,530.24
  6. Step 6: Final answer
    x = 11,670.28

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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.