Home / 15,495.05-21,383.24-8,421.47

Finding the Fourth Proportional to 15,495.05, 21,383.24 and 8,421.47

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Solution

The fourth proportional to 15,495.05, 21,383.24 and 8,421.47 is: 11,621.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,495.05 : 21,383.24 = 8,421.47 : x
  2. Step 2: Convert to fraction form
    15,495.05/21,383.24 = 8,421.47/x
  3. Step 3: Cross multiply
    15,495.05x = 21,383.24 × 8,421.47
  4. Step 4: Simplify right side
    15,495.05x = 180,078,292.70
  5. Step 5: Solve for x
    x = 180,078,292.70/15,495.05
  6. Step 6: Final answer
    x = 11,621.67

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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.