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Finding the Fourth Proportional to 18,795.64, 25,878.95 and 15,957.10

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Solution

The fourth proportional to 18,795.64, 25,878.95 and 15,957.10 is: 21,970.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,795.64 : 25,878.95 = 15,957.10 : x
  2. Step 2: Convert to fraction form
    18,795.64/25,878.95 = 15,957.10/x
  3. Step 3: Cross multiply
    18,795.64x = 25,878.95 × 15,957.10
  4. Step 4: Simplify right side
    18,795.64x = 412,952,993.05
  5. Step 5: Solve for x
    x = 412,952,993.05/18,795.64
  6. Step 6: Final answer
    x = 21,970.68

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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.