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Finding the Fourth Proportional to 21,520.08, 29,719.08 and 17,090.64

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Solution

The fourth proportional to 21,520.08, 29,719.08 and 17,090.64 is: 23,602.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,520.08 : 29,719.08 = 17,090.64 : x
  2. Step 2: Convert to fraction form
    21,520.08/29,719.08 = 17,090.64/x
  3. Step 3: Cross multiply
    21,520.08x = 29,719.08 × 17,090.64
  4. Step 4: Simplify right side
    21,520.08x = 507,918,097.41
  5. Step 5: Solve for x
    x = 507,918,097.41/21,520.08
  6. Step 6: Final answer
    x = 23,602.05

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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.