Home / 15,277.80-21,083.58-9,309.72

Finding the Fourth Proportional to 15,277.80, 21,083.58 and 9,309.72

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Solution

The fourth proportional to 15,277.80, 21,083.58 and 9,309.72 is: 12,847.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,277.80 : 21,083.58 = 9,309.72 : x
  2. Step 2: Convert to fraction form
    15,277.80/21,083.58 = 9,309.72/x
  3. Step 3: Cross multiply
    15,277.80x = 21,083.58 × 9,309.72
  4. Step 4: Simplify right side
    15,277.80x = 196,282,226.40
  5. Step 5: Solve for x
    x = 196,282,226.40/15,277.80
  6. Step 6: Final answer
    x = 12,847.55

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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.