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Finding the Fourth Proportional to 9,783.70, 14,649.63 and 5,156.98

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Solution

The fourth proportional to 9,783.70, 14,649.63 and 5,156.98 is: 7,721.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,783.70 : 14,649.63 = 5,156.98 : x
  2. Step 2: Convert to fraction form
    9,783.70/14,649.63 = 5,156.98/x
  3. Step 3: Cross multiply
    9,783.70x = 14,649.63 × 5,156.98
  4. Step 4: Simplify right side
    9,783.70x = 75,547,848.92
  5. Step 5: Solve for x
    x = 75,547,848.92/9,783.70
  6. Step 6: Final answer
    x = 7,721.81

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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.