Home / 28,461.21-39,278.63-15,716.82

Finding the Fourth Proportional to 28,461.21, 39,278.63 and 15,716.82

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Solution

The fourth proportional to 28,461.21, 39,278.63 and 15,716.82 is: 21,690.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,461.21 : 39,278.63 = 15,716.82 : x
  2. Step 2: Convert to fraction form
    28,461.21/39,278.63 = 15,716.82/x
  3. Step 3: Cross multiply
    28,461.21x = 39,278.63 × 15,716.82
  4. Step 4: Simplify right side
    28,461.21x = 617,335,078.97
  5. Step 5: Solve for x
    x = 617,335,078.97/28,461.21
  6. Step 6: Final answer
    x = 21,690.40

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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.