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Finding the Fourth Proportional to 21,061.80, 29,525.40 and 21,061.80

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Solution

The fourth proportional to 21,061.80, 29,525.40 and 21,061.80 is: 29,525.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,061.80 : 29,525.40 = 21,061.80 : x
  2. Step 2: Convert to fraction form
    21,061.80/29,525.40 = 21,061.80/x
  3. Step 3: Cross multiply
    21,061.80x = 29,525.40 × 21,061.80
  4. Step 4: Simplify right side
    21,061.80x = 621,858,069.72
  5. Step 5: Solve for x
    x = 621,858,069.72/21,061.80
  6. Step 6: Final answer
    x = 29,525.40

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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.