Home / 28,065.21-38,730.21-15,318.49

Finding the Fourth Proportional to 28,065.21, 38,730.21 and 15,318.49

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Solution

The fourth proportional to 28,065.21, 38,730.21 and 15,318.49 is: 21,139.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,065.21 : 38,730.21 = 15,318.49 : x
  2. Step 2: Convert to fraction form
    28,065.21/38,730.21 = 15,318.49/x
  3. Step 3: Cross multiply
    28,065.21x = 38,730.21 × 15,318.49
  4. Step 4: Simplify right side
    28,065.21x = 593,288,334.58
  5. Step 5: Solve for x
    x = 593,288,334.58/28,065.21
  6. Step 6: Final answer
    x = 21,139.64

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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.