Home / 12,821.68-17,685.30-9,643.24

Finding the Fourth Proportional to 12,821.68, 17,685.30 and 9,643.24

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Solution

The fourth proportional to 12,821.68, 17,685.30 and 9,643.24 is: 13,301.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,821.68 : 17,685.30 = 9,643.24 : x
  2. Step 2: Convert to fraction form
    12,821.68/17,685.30 = 9,643.24/x
  3. Step 3: Cross multiply
    12,821.68x = 17,685.30 × 9,643.24
  4. Step 4: Simplify right side
    12,821.68x = 170,543,592.37
  5. Step 5: Solve for x
    x = 170,543,592.37/12,821.68
  6. Step 6: Final answer
    x = 13,301.19

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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.