Home / 11,143.08-15,376.37-6,428.88

Finding the Fourth Proportional to 11,143.08, 15,376.37 and 6,428.88

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Solution

The fourth proportional to 11,143.08, 15,376.37 and 6,428.88 is: 8,871.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,143.08 : 15,376.37 = 6,428.88 : x
  2. Step 2: Convert to fraction form
    11,143.08/15,376.37 = 6,428.88/x
  3. Step 3: Cross multiply
    11,143.08x = 15,376.37 × 6,428.88
  4. Step 4: Simplify right side
    11,143.08x = 98,852,805.42
  5. Step 5: Solve for x
    x = 98,852,805.42/11,143.08
  6. Step 6: Final answer
    x = 8,871.23

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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.