Home / 11,695.61-16,139.75-6,390.47

Finding the Fourth Proportional to 11,695.61, 16,139.75 and 6,390.47

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Solution

The fourth proportional to 11,695.61, 16,139.75 and 6,390.47 is: 8,818.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,695.61 : 16,139.75 = 6,390.47 : x
  2. Step 2: Convert to fraction form
    11,695.61/16,139.75 = 6,390.47/x
  3. Step 3: Cross multiply
    11,695.61x = 16,139.75 × 6,390.47
  4. Step 4: Simplify right side
    11,695.61x = 103,140,556.23
  5. Step 5: Solve for x
    x = 103,140,556.23/11,695.61
  6. Step 6: Final answer
    x = 8,818.74

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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.