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Finding the Fourth Proportional to 8,521.40, 11,755.40 and 5,495.72

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Solution

The fourth proportional to 8,521.40, 11,755.40 and 5,495.72 is: 7,581.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,521.40 : 11,755.40 = 5,495.72 : x
  2. Step 2: Convert to fraction form
    8,521.40/11,755.40 = 5,495.72/x
  3. Step 3: Cross multiply
    8,521.40x = 11,755.40 × 5,495.72
  4. Step 4: Simplify right side
    8,521.40x = 64,604,328.11
  5. Step 5: Solve for x
    x = 64,604,328.11/8,521.40
  6. Step 6: Final answer
    x = 7,581.43

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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.