Home / 21,041.87-31,554.57-7,887.07

Finding the Fourth Proportional to 21,041.87, 31,554.57 and 7,887.07

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Solution

The fourth proportional to 21,041.87, 31,554.57 and 7,887.07 is: 11,827.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,041.87 : 31,554.57 = 7,887.07 : x
  2. Step 2: Convert to fraction form
    21,041.87/31,554.57 = 7,887.07/x
  3. Step 3: Cross multiply
    21,041.87x = 31,554.57 × 7,887.07
  4. Step 4: Simplify right side
    21,041.87x = 248,872,944.64
  5. Step 5: Solve for x
    x = 248,872,944.64/21,041.87
  6. Step 6: Final answer
    x = 11,827.51

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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.