Home / 21,285.20-29,374.47-11,853.75

Finding the Fourth Proportional to 21,285.20, 29,374.47 and 11,853.75

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Solution

The fourth proportional to 21,285.20, 29,374.47 and 11,853.75 is: 16,358.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,285.20 : 29,374.47 = 11,853.75 : x
  2. Step 2: Convert to fraction form
    21,285.20/29,374.47 = 11,853.75/x
  3. Step 3: Cross multiply
    21,285.20x = 29,374.47 × 11,853.75
  4. Step 4: Simplify right side
    21,285.20x = 348,197,623.76
  5. Step 5: Solve for x
    x = 348,197,623.76/21,285.20
  6. Step 6: Final answer
    x = 16,358.68

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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.