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Finding the Fourth Proportional to 11,965, 17,828.57 and 10,656.40

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Solution

The fourth proportional to 11,965, 17,828.57 and 10,656.40 is: 15,878.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,965 : 17,828.57 = 10,656.40 : x
  2. Step 2: Convert to fraction form
    11,965/17,828.57 = 10,656.40/x
  3. Step 3: Cross multiply
    11,965x = 17,828.57 × 10,656.40
  4. Step 4: Simplify right side
    11,965x = 189,988,373.35
  5. Step 5: Solve for x
    x = 189,988,373.35/11,965
  6. Step 6: Final answer
    x = 15,878.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.