Home / 11,170.69-15,414.63-6,390.47

Finding the Fourth Proportional to 11,170.69, 15,414.63 and 6,390.47

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Solution

The fourth proportional to 11,170.69, 15,414.63 and 6,390.47 is: 8,818.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,170.69 : 15,414.63 = 6,390.47 : x
  2. Step 2: Convert to fraction form
    11,170.69/15,414.63 = 6,390.47/x
  3. Step 3: Cross multiply
    11,170.69x = 15,414.63 × 6,390.47
  4. Step 4: Simplify right side
    11,170.69x = 98,506,730.58
  5. Step 5: Solve for x
    x = 98,506,730.58/11,170.69
  6. Step 6: Final answer
    x = 8,818.32

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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.