Home / 15,495.20-21,383.54-8,421.62

Finding the Fourth Proportional to 15,495.20, 21,383.54 and 8,421.62

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Solution

The fourth proportional to 15,495.20, 21,383.54 and 8,421.62 is: 11,621.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,495.20 : 21,383.54 = 8,421.62 : x
  2. Step 2: Convert to fraction form
    15,495.20/21,383.54 = 8,421.62/x
  3. Step 3: Cross multiply
    15,495.20x = 21,383.54 × 8,421.62
  4. Step 4: Simplify right side
    15,495.20x = 180,084,006.03
  5. Step 5: Solve for x
    x = 180,084,006.03/15,495.20
  6. Step 6: Final answer
    x = 11,621.93

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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.