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Finding the Fourth Proportional to 18,915.36, 28,385.28 and 8,526.48

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Solution

The fourth proportional to 18,915.36, 28,385.28 and 8,526.48 is: 12,795.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,915.36 : 28,385.28 = 8,526.48 : x
  2. Step 2: Convert to fraction form
    18,915.36/28,385.28 = 8,526.48/x
  3. Step 3: Cross multiply
    18,915.36x = 28,385.28 × 8,526.48
  4. Step 4: Simplify right side
    18,915.36x = 242,026,522.21
  5. Step 5: Solve for x
    x = 242,026,522.21/18,915.36
  6. Step 6: Final answer
    x = 12,795.24

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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.