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Finding the Fourth Proportional to 15,298.60, 21,141.10 and 13,029.60

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Solution

The fourth proportional to 15,298.60, 21,141.10 and 13,029.60 is: 18,005.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,298.60 : 21,141.10 = 13,029.60 : x
  2. Step 2: Convert to fraction form
    15,298.60/21,141.10 = 13,029.60/x
  3. Step 3: Cross multiply
    15,298.60x = 21,141.10 × 13,029.60
  4. Step 4: Simplify right side
    15,298.60x = 275,460,076.56
  5. Step 5: Solve for x
    x = 275,460,076.56/15,298.60
  6. Step 6: Final answer
    x = 18,005.57

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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.