Home / 28,579.10-42,875.40-11,929.88

Finding the Fourth Proportional to 28,579.10, 42,875.40 and 11,929.88

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Solution

The fourth proportional to 28,579.10, 42,875.40 and 11,929.88 is: 17,897.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,579.10 : 42,875.40 = 11,929.88 : x
  2. Step 2: Convert to fraction form
    28,579.10/42,875.40 = 11,929.88/x
  3. Step 3: Cross multiply
    28,579.10x = 42,875.40 × 11,929.88
  4. Step 4: Simplify right side
    28,579.10x = 511,498,376.95
  5. Step 5: Solve for x
    x = 511,498,376.95/28,579.10
  6. Step 6: Final answer
    x = 17,897.64

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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.