Home / 11,695.45-16,139.53-6,390.15

Finding the Fourth Proportional to 11,695.45, 16,139.53 and 6,390.15

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Solution

The fourth proportional to 11,695.45, 16,139.53 and 6,390.15 is: 8,818.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,695.45 : 16,139.53 = 6,390.15 : x
  2. Step 2: Convert to fraction form
    11,695.45/16,139.53 = 6,390.15/x
  3. Step 3: Cross multiply
    11,695.45x = 16,139.53 × 6,390.15
  4. Step 4: Simplify right side
    11,695.45x = 103,133,985.68
  5. Step 5: Solve for x
    x = 103,133,985.68/11,695.45
  6. Step 6: Final answer
    x = 8,818.30

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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.