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Finding the Fourth Proportional to 7,778.56, 11,681.76 and 7,465.36

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Solution

The fourth proportional to 7,778.56, 11,681.76 and 7,465.36 is: 11,211.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,778.56 : 11,681.76 = 7,465.36 : x
  2. Step 2: Convert to fraction form
    7,778.56/11,681.76 = 7,465.36/x
  3. Step 3: Cross multiply
    7,778.56x = 11,681.76 × 7,465.36
  4. Step 4: Simplify right side
    7,778.56x = 87,208,543.83
  5. Step 5: Solve for x
    x = 87,208,543.83/7,778.56
  6. Step 6: Final answer
    x = 11,211.40

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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.