Home / 21,535.64-29,719.12-11,975.20

Finding the Fourth Proportional to 21,535.64, 29,719.12 and 11,975.20

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Solution

The fourth proportional to 21,535.64, 29,719.12 and 11,975.20 is: 16,525.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,535.64 : 29,719.12 = 11,975.20 : x
  2. Step 2: Convert to fraction form
    21,535.64/29,719.12 = 11,975.20/x
  3. Step 3: Cross multiply
    21,535.64x = 29,719.12 × 11,975.20
  4. Step 4: Simplify right side
    21,535.64x = 355,892,405.82
  5. Step 5: Solve for x
    x = 355,892,405.82/21,535.64
  6. Step 6: Final answer
    x = 16,525.74

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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.