Home / 15,478.24-21,359.64-8,404.60

Finding the Fourth Proportional to 15,478.24, 21,359.64 and 8,404.60

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Solution

The fourth proportional to 15,478.24, 21,359.64 and 8,404.60 is: 11,598.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,478.24 : 21,359.64 = 8,404.60 : x
  2. Step 2: Convert to fraction form
    15,478.24/21,359.64 = 8,404.60/x
  3. Step 3: Cross multiply
    15,478.24x = 21,359.64 × 8,404.60
  4. Step 4: Simplify right side
    15,478.24x = 179,519,230.34
  5. Step 5: Solve for x
    x = 179,519,230.34/15,478.24
  6. Step 6: Final answer
    x = 11,598.17

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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.