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Finding the Fourth Proportional to 15,502.30, 21,742.10 and 15,502.30

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Solution

The fourth proportional to 15,502.30, 21,742.10 and 15,502.30 is: 21,742.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,502.30 : 21,742.10 = 15,502.30 : x
  2. Step 2: Convert to fraction form
    15,502.30/21,742.10 = 15,502.30/x
  3. Step 3: Cross multiply
    15,502.30x = 21,742.10 × 15,502.30
  4. Step 4: Simplify right side
    15,502.30x = 337,052,556.83
  5. Step 5: Solve for x
    x = 337,052,556.83/15,502.30
  6. Step 6: Final answer
    x = 21,742.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.