Home / 15,280.24-21,064.20-11,919.28

Finding the Fourth Proportional to 15,280.24, 21,064.20 and 11,919.28

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Solution

The fourth proportional to 15,280.24, 21,064.20 and 11,919.28 is: 16,431.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,280.24 : 21,064.20 = 11,919.28 : x
  2. Step 2: Convert to fraction form
    15,280.24/21,064.20 = 11,919.28/x
  3. Step 3: Cross multiply
    15,280.24x = 21,064.20 × 11,919.28
  4. Step 4: Simplify right side
    15,280.24x = 251,070,097.78
  5. Step 5: Solve for x
    x = 251,070,097.78/15,280.24
  6. Step 6: Final answer
    x = 16,431.03

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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.