Home / 11,397.48-15,729.06-6,428.52

Finding the Fourth Proportional to 11,397.48, 15,729.06 and 6,428.52

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Solution

The fourth proportional to 11,397.48, 15,729.06 and 6,428.52 is: 8,871.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,397.48 : 15,729.06 = 6,428.52 : x
  2. Step 2: Convert to fraction form
    11,397.48/15,729.06 = 6,428.52/x
  3. Step 3: Cross multiply
    11,397.48x = 15,729.06 × 6,428.52
  4. Step 4: Simplify right side
    11,397.48x = 101,114,576.79
  5. Step 5: Solve for x
    x = 101,114,576.79/11,397.48
  6. Step 6: Final answer
    x = 8,871.66

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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.