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Finding the Fourth Proportional to 8,705.16, 12,012.48 and 5,726.88

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Solution

The fourth proportional to 8,705.16, 12,012.48 and 5,726.88 is: 7,902.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,705.16 : 12,012.48 = 5,726.88 : x
  2. Step 2: Convert to fraction form
    8,705.16/12,012.48 = 5,726.88/x
  3. Step 3: Cross multiply
    8,705.16x = 12,012.48 × 5,726.88
  4. Step 4: Simplify right side
    8,705.16x = 68,794,031.46
  5. Step 5: Solve for x
    x = 68,794,031.46/8,705.16
  6. Step 6: Final answer
    x = 7,902.67

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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.