Home / 12,308.72-16,985.40-6,718.64

Finding the Fourth Proportional to 12,308.72, 16,985.40 and 6,718.64

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Solution

The fourth proportional to 12,308.72, 16,985.40 and 6,718.64 is: 9,271.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,308.72 : 16,985.40 = 6,718.64 : x
  2. Step 2: Convert to fraction form
    12,308.72/16,985.40 = 6,718.64/x
  3. Step 3: Cross multiply
    12,308.72x = 16,985.40 × 6,718.64
  4. Step 4: Simplify right side
    12,308.72x = 114,118,787.86
  5. Step 5: Solve for x
    x = 114,118,787.86/12,308.72
  6. Step 6: Final answer
    x = 9,271.38

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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.