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Finding the Fourth Proportional to 11,339.77, 15,643.43 and 9,765.13

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Solution

The fourth proportional to 11,339.77, 15,643.43 and 9,765.13 is: 13,471.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,339.77 : 15,643.43 = 9,765.13 : x
  2. Step 2: Convert to fraction form
    11,339.77/15,643.43 = 9,765.13/x
  3. Step 3: Cross multiply
    11,339.77x = 15,643.43 × 9,765.13
  4. Step 4: Simplify right side
    11,339.77x = 152,760,127.60
  5. Step 5: Solve for x
    x = 152,760,127.60/11,339.77
  6. Step 6: Final answer
    x = 13,471.18

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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.