Home / 21,090.60-29,134.80-16,869.60

Finding the Fourth Proportional to 21,090.60, 29,134.80 and 16,869.60

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Solution

The fourth proportional to 21,090.60, 29,134.80 and 16,869.60 is: 23,303.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,090.60 : 29,134.80 = 16,869.60 : x
  2. Step 2: Convert to fraction form
    21,090.60/29,134.80 = 16,869.60/x
  3. Step 3: Cross multiply
    21,090.60x = 29,134.80 × 16,869.60
  4. Step 4: Simplify right side
    21,090.60x = 491,492,422.08
  5. Step 5: Solve for x
    x = 491,492,422.08/21,090.60
  6. Step 6: Final answer
    x = 23,303.86

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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.