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Finding the Fourth Proportional to 18,915.87, 26,108.42 and 10,962.48

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Solution

The fourth proportional to 18,915.87, 26,108.42 and 10,962.48 is: 15,130.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,915.87 : 26,108.42 = 10,962.48 : x
  2. Step 2: Convert to fraction form
    18,915.87/26,108.42 = 10,962.48/x
  3. Step 3: Cross multiply
    18,915.87x = 26,108.42 × 10,962.48
  4. Step 4: Simplify right side
    18,915.87x = 286,212,977.27
  5. Step 5: Solve for x
    x = 286,212,977.27/18,915.87
  6. Step 6: Final answer
    x = 15,130.84

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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.