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Finding the Fourth Proportional to 27,312.66, 40,982.40 and 9,783.90

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Solution

The fourth proportional to 27,312.66, 40,982.40 and 9,783.90 is: 14,680.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,312.66 : 40,982.40 = 9,783.90 : x
  2. Step 2: Convert to fraction form
    27,312.66/40,982.40 = 9,783.90/x
  3. Step 3: Cross multiply
    27,312.66x = 40,982.40 × 9,783.90
  4. Step 4: Simplify right side
    27,312.66x = 400,967,703.36
  5. Step 5: Solve for x
    x = 400,967,703.36/27,312.66
  6. Step 6: Final answer
    x = 14,680.65

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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.