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Finding the Fourth Proportional to 15,209.60, 21,241.60 and 15,209.60

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Solution

The fourth proportional to 15,209.60, 21,241.60 and 15,209.60 is: 21,241.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,209.60 : 21,241.60 = 15,209.60 : x
  2. Step 2: Convert to fraction form
    15,209.60/21,241.60 = 15,209.60/x
  3. Step 3: Cross multiply
    15,209.60x = 21,241.60 × 15,209.60
  4. Step 4: Simplify right side
    15,209.60x = 323,076,239.36
  5. Step 5: Solve for x
    x = 323,076,239.36/15,209.60
  6. Step 6: Final answer
    x = 21,241.60

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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.