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Finding the Fourth Proportional to 19,915.76, 27,483.16 and 10,963.28

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Solution

The fourth proportional to 19,915.76, 27,483.16 and 10,963.28 is: 15,129.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,915.76 : 27,483.16 = 10,963.28 : x
  2. Step 2: Convert to fraction form
    19,915.76/27,483.16 = 10,963.28/x
  3. Step 3: Cross multiply
    19,915.76x = 27,483.16 × 10,963.28
  4. Step 4: Simplify right side
    19,915.76x = 301,305,578.36
  5. Step 5: Solve for x
    x = 301,305,578.36/19,915.76
  6. Step 6: Final answer
    x = 15,129.00

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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.