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Finding the Fourth Proportional to 18,435.58, 25,421 and 12,456.88

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Solution

The fourth proportional to 18,435.58, 25,421 and 12,456.88 is: 17,176.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,435.58 : 25,421 = 12,456.88 : x
  2. Step 2: Convert to fraction form
    18,435.58/25,421 = 12,456.88/x
  3. Step 3: Cross multiply
    18,435.58x = 25,421 × 12,456.88
  4. Step 4: Simplify right side
    18,435.58x = 316,666,346.48
  5. Step 5: Solve for x
    x = 316,666,346.48/18,435.58
  6. Step 6: Final answer
    x = 17,176.91

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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.