Home / 25,955.64-38,904.12-12,780.36

Finding the Fourth Proportional to 25,955.64, 38,904.12 and 12,780.36

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Solution

The fourth proportional to 25,955.64, 38,904.12 and 12,780.36 is: 19,156.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,955.64 : 38,904.12 = 12,780.36 : x
  2. Step 2: Convert to fraction form
    25,955.64/38,904.12 = 12,780.36/x
  3. Step 3: Cross multiply
    25,955.64x = 38,904.12 × 12,780.36
  4. Step 4: Simplify right side
    25,955.64x = 497,208,659.08
  5. Step 5: Solve for x
    x = 497,208,659.08/25,955.64
  6. Step 6: Final answer
    x = 19,156.09

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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.