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Finding the Fourth Proportional to 11,937.66, 17,872.65 and 9,920.16

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Solution

The fourth proportional to 11,937.66, 17,872.65 and 9,920.16 is: 14,852.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,937.66 : 17,872.65 = 9,920.16 : x
  2. Step 2: Convert to fraction form
    11,937.66/17,872.65 = 9,920.16/x
  3. Step 3: Cross multiply
    11,937.66x = 17,872.65 × 9,920.16
  4. Step 4: Simplify right side
    11,937.66x = 177,299,547.62
  5. Step 5: Solve for x
    x = 177,299,547.62/11,937.66
  6. Step 6: Final answer
    x = 14,852.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.