Home / 12,685.12-19,021.92-9,765.28

Finding the Fourth Proportional to 12,685.12, 19,021.92 and 9,765.28

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Solution

The fourth proportional to 12,685.12, 19,021.92 and 9,765.28 is: 14,643.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,685.12 : 19,021.92 = 9,765.28 : x
  2. Step 2: Convert to fraction form
    12,685.12/19,021.92 = 9,765.28/x
  3. Step 3: Cross multiply
    12,685.12x = 19,021.92 × 9,765.28
  4. Step 4: Simplify right side
    12,685.12x = 185,754,374.94
  5. Step 5: Solve for x
    x = 185,754,374.94/12,685.12
  6. Step 6: Final answer
    x = 14,643.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.