Home / 21,080.64-31,642.30-10,558.20

Finding the Fourth Proportional to 21,080.64, 31,642.30 and 10,558.20

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Solution

The fourth proportional to 21,080.64, 31,642.30 and 10,558.20 is: 15,847.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.64 : 31,642.30 = 10,558.20 : x
  2. Step 2: Convert to fraction form
    21,080.64/31,642.30 = 10,558.20/x
  3. Step 3: Cross multiply
    21,080.64x = 31,642.30 × 10,558.20
  4. Step 4: Simplify right side
    21,080.64x = 334,085,731.86
  5. Step 5: Solve for x
    x = 334,085,731.86/21,080.64
  6. Step 6: Final answer
    x = 15,847.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.