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Finding the Fourth Proportional to 9,719.70, 13,355.05 and 7,726.80

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Solution

The fourth proportional to 9,719.70, 13,355.05 and 7,726.80 is: 10,616.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,719.70 : 13,355.05 = 7,726.80 : x
  2. Step 2: Convert to fraction form
    9,719.70/13,355.05 = 7,726.80/x
  3. Step 3: Cross multiply
    9,719.70x = 13,355.05 × 7,726.80
  4. Step 4: Simplify right side
    9,719.70x = 103,191,800.34
  5. Step 5: Solve for x
    x = 103,191,800.34/9,719.70
  6. Step 6: Final answer
    x = 10,616.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.