Home / 9,905.47-13,658.34-6,315.64

Finding the Fourth Proportional to 9,905.47, 13,658.34 and 6,315.64

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Solution

The fourth proportional to 9,905.47, 13,658.34 and 6,315.64 is: 8,708.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,905.47 : 13,658.34 = 6,315.64 : x
  2. Step 2: Convert to fraction form
    9,905.47/13,658.34 = 6,315.64/x
  3. Step 3: Cross multiply
    9,905.47x = 13,658.34 × 6,315.64
  4. Step 4: Simplify right side
    9,905.47x = 86,261,090.15
  5. Step 5: Solve for x
    x = 86,261,090.15/9,905.47
  6. Step 6: Final answer
    x = 8,708.43

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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.