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Finding the Fourth Proportional to 15,548.80, 21,814.40 and 15,548.80

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Solution

The fourth proportional to 15,548.80, 21,814.40 and 15,548.80 is: 21,814.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,548.80 : 21,814.40 = 15,548.80 : x
  2. Step 2: Convert to fraction form
    15,548.80/21,814.40 = 15,548.80/x
  3. Step 3: Cross multiply
    15,548.80x = 21,814.40 × 15,548.80
  4. Step 4: Simplify right side
    15,548.80x = 339,187,742.72
  5. Step 5: Solve for x
    x = 339,187,742.72/15,548.80
  6. Step 6: Final answer
    x = 21,814.40

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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.