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Finding the Fourth Proportional to 15,963.78, 22,028.08 and 9,157.45

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Solution

The fourth proportional to 15,963.78, 22,028.08 and 9,157.45 is: 12,636.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,963.78 : 22,028.08 = 9,157.45 : x
  2. Step 2: Convert to fraction form
    15,963.78/22,028.08 = 9,157.45/x
  3. Step 3: Cross multiply
    15,963.78x = 22,028.08 × 9,157.45
  4. Step 4: Simplify right side
    15,963.78x = 201,721,041.20
  5. Step 5: Solve for x
    x = 201,721,041.20/15,963.78
  6. Step 6: Final answer
    x = 12,636.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.