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Finding the Fourth Proportional to 19,651.78, 29,477.85 and 7,962.25

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Solution

The fourth proportional to 19,651.78, 29,477.85 and 7,962.25 is: 11,943.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,651.78 : 29,477.85 = 7,962.25 : x
  2. Step 2: Convert to fraction form
    19,651.78/29,477.85 = 7,962.25/x
  3. Step 3: Cross multiply
    19,651.78x = 29,477.85 × 7,962.25
  4. Step 4: Simplify right side
    19,651.78x = 234,710,011.16
  5. Step 5: Solve for x
    x = 234,710,011.16/19,651.78
  6. Step 6: Final answer
    x = 11,943.45

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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.