Home / 14,057.60-21,086.40-12,648.20

Finding the Fourth Proportional to 14,057.60, 21,086.40 and 12,648.20

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Solution

The fourth proportional to 14,057.60, 21,086.40 and 12,648.20 is: 18,972.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,057.60 : 21,086.40 = 12,648.20 : x
  2. Step 2: Convert to fraction form
    14,057.60/21,086.40 = 12,648.20/x
  3. Step 3: Cross multiply
    14,057.60x = 21,086.40 × 12,648.20
  4. Step 4: Simplify right side
    14,057.60x = 266,705,004.48
  5. Step 5: Solve for x
    x = 266,705,004.48/14,057.60
  6. Step 6: Final answer
    x = 18,972.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.