Home / 10,655.28-15,986.16-6,443.28

Finding the Fourth Proportional to 10,655.28, 15,986.16 and 6,443.28

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Solution

The fourth proportional to 10,655.28, 15,986.16 and 6,443.28 is: 9,666.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,655.28 : 15,986.16 = 6,443.28 : x
  2. Step 2: Convert to fraction form
    10,655.28/15,986.16 = 6,443.28/x
  3. Step 3: Cross multiply
    10,655.28x = 15,986.16 × 6,443.28
  4. Step 4: Simplify right side
    10,655.28x = 103,003,305.00
  5. Step 5: Solve for x
    x = 103,003,305.00/10,655.28
  6. Step 6: Final answer
    x = 9,666.88

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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.