Home / 15,478.28-21,360.26-8,404.84

Finding the Fourth Proportional to 15,478.28, 21,360.26 and 8,404.84

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Solution

The fourth proportional to 15,478.28, 21,360.26 and 8,404.84 is: 11,598.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,478.28 : 21,360.26 = 8,404.84 : x
  2. Step 2: Convert to fraction form
    15,478.28/21,360.26 = 8,404.84/x
  3. Step 3: Cross multiply
    15,478.28x = 21,360.26 × 8,404.84
  4. Step 4: Simplify right side
    15,478.28x = 179,529,567.66
  5. Step 5: Solve for x
    x = 179,529,567.66/15,478.28
  6. Step 6: Final answer
    x = 11,598.81

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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.