Home / 21,218.55-31,828.83-6,987.93

Finding the Fourth Proportional to 21,218.55, 31,828.83 and 6,987.93

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Solution

The fourth proportional to 21,218.55, 31,828.83 and 6,987.93 is: 10,482.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.55 : 31,828.83 = 6,987.93 : x
  2. Step 2: Convert to fraction form
    21,218.55/31,828.83 = 6,987.93/x
  3. Step 3: Cross multiply
    21,218.55x = 31,828.83 × 6,987.93
  4. Step 4: Simplify right side
    21,218.55x = 222,417,636.02
  5. Step 5: Solve for x
    x = 222,417,636.02/21,218.55
  6. Step 6: Final answer
    x = 10,482.23

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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.