Home / 21,080.60-29,090.88-11,649.20

Finding the Fourth Proportional to 21,080.60, 29,090.88 and 11,649.20

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Solution

The fourth proportional to 21,080.60, 29,090.88 and 11,649.20 is: 16,075.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.60 : 29,090.88 = 11,649.20 : x
  2. Step 2: Convert to fraction form
    21,080.60/29,090.88 = 11,649.20/x
  3. Step 3: Cross multiply
    21,080.60x = 29,090.88 × 11,649.20
  4. Step 4: Simplify right side
    21,080.60x = 338,885,479.30
  5. Step 5: Solve for x
    x = 338,885,479.30/21,080.60
  6. Step 6: Final answer
    x = 16,075.70

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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.