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Finding the Fourth Proportional to 15,203.70, 21,051.09 and 14,912.10

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Solution

The fourth proportional to 15,203.70, 21,051.09 and 14,912.10 is: 20,647.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,203.70 : 21,051.09 = 14,912.10 : x
  2. Step 2: Convert to fraction form
    15,203.70/21,051.09 = 14,912.10/x
  3. Step 3: Cross multiply
    15,203.70x = 21,051.09 × 14,912.10
  4. Step 4: Simplify right side
    15,203.70x = 313,915,959.19
  5. Step 5: Solve for x
    x = 313,915,959.19/15,203.70
  6. Step 6: Final answer
    x = 20,647.34

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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.