Home / 9,915.78-13,688.17-6,335.45

Finding the Fourth Proportional to 9,915.78, 13,688.17 and 6,335.45

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Solution

The fourth proportional to 9,915.78, 13,688.17 and 6,335.45 is: 8,745.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,915.78 : 13,688.17 = 6,335.45 : x
  2. Step 2: Convert to fraction form
    9,915.78/13,688.17 = 6,335.45/x
  3. Step 3: Cross multiply
    9,915.78x = 13,688.17 × 6,335.45
  4. Step 4: Simplify right side
    9,915.78x = 86,720,632.35
  5. Step 5: Solve for x
    x = 86,720,632.35/9,915.78
  6. Step 6: Final answer
    x = 8,745.72

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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.