Home / 15,314.28-21,142.26-12,281.64

Finding the Fourth Proportional to 15,314.28, 21,142.26 and 12,281.64

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Solution

The fourth proportional to 15,314.28, 21,142.26 and 12,281.64 is: 16,955.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,314.28 : 21,142.26 = 12,281.64 : x
  2. Step 2: Convert to fraction form
    15,314.28/21,142.26 = 12,281.64/x
  3. Step 3: Cross multiply
    15,314.28x = 21,142.26 × 12,281.64
  4. Step 4: Simplify right side
    15,314.28x = 259,661,626.11
  5. Step 5: Solve for x
    x = 259,661,626.11/15,314.28
  6. Step 6: Final answer
    x = 16,955.52

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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.