Home / 12,811.08-17,687.36-9,821.28

Finding the Fourth Proportional to 12,811.08, 17,687.36 and 9,821.28

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Solution

The fourth proportional to 12,811.08, 17,687.36 and 9,821.28 is: 13,559.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,811.08 : 17,687.36 = 9,821.28 : x
  2. Step 2: Convert to fraction form
    12,811.08/17,687.36 = 9,821.28/x
  3. Step 3: Cross multiply
    12,811.08x = 17,687.36 × 9,821.28
  4. Step 4: Simplify right side
    12,811.08x = 173,712,515.02
  5. Step 5: Solve for x
    x = 173,712,515.02/12,811.08
  6. Step 6: Final answer
    x = 13,559.55

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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.