Home / 21,027.18-31,546.10-6,987.28

Finding the Fourth Proportional to 21,027.18, 31,546.10 and 6,987.28

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Solution

The fourth proportional to 21,027.18, 31,546.10 and 6,987.28 is: 10,482.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,027.18 : 31,546.10 = 6,987.28 : x
  2. Step 2: Convert to fraction form
    21,027.18/31,546.10 = 6,987.28/x
  3. Step 3: Cross multiply
    21,027.18x = 31,546.10 × 6,987.28
  4. Step 4: Simplify right side
    21,027.18x = 220,421,433.61
  5. Step 5: Solve for x
    x = 220,421,433.61/21,027.18
  6. Step 6: Final answer
    x = 10,482.69

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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.