Home / 12,778.40-19,176.91-6,543.62

Finding the Fourth Proportional to 12,778.40, 19,176.91 and 6,543.62

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Solution

The fourth proportional to 12,778.40, 19,176.91 and 6,543.62 is: 9,820.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,778.40 : 19,176.91 = 6,543.62 : x
  2. Step 2: Convert to fraction form
    12,778.40/19,176.91 = 6,543.62/x
  3. Step 3: Cross multiply
    12,778.40x = 19,176.91 × 6,543.62
  4. Step 4: Simplify right side
    12,778.40x = 125,486,443.40
  5. Step 5: Solve for x
    x = 125,486,443.40/12,778.40
  6. Step 6: Final answer
    x = 9,820.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.