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Finding the Fourth Proportional to 13,491.16, 18,616.38 and 7,521.70

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Solution

The fourth proportional to 13,491.16, 18,616.38 and 7,521.70 is: 10,379.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,491.16 : 18,616.38 = 7,521.70 : x
  2. Step 2: Convert to fraction form
    13,491.16/18,616.38 = 7,521.70/x
  3. Step 3: Cross multiply
    13,491.16x = 18,616.38 × 7,521.70
  4. Step 4: Simplify right side
    13,491.16x = 140,026,825.45
  5. Step 5: Solve for x
    x = 140,026,825.45/13,491.16
  6. Step 6: Final answer
    x = 10,379.15

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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.