Home / 15,284.79-21,061.38-12,288.60

Finding the Fourth Proportional to 15,284.79, 21,061.38 and 12,288.60

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Solution

The fourth proportional to 15,284.79, 21,061.38 and 12,288.60 is: 16,932.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,284.79 : 21,061.38 = 12,288.60 : x
  2. Step 2: Convert to fraction form
    15,284.79/21,061.38 = 12,288.60/x
  3. Step 3: Cross multiply
    15,284.79x = 21,061.38 × 12,288.60
  4. Step 4: Simplify right side
    15,284.79x = 258,814,874.27
  5. Step 5: Solve for x
    x = 258,814,874.27/15,284.79
  6. Step 6: Final answer
    x = 16,932.84

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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.