Home / 21,189.34-31,787.70-8,716.24

Finding the Fourth Proportional to 21,189.34, 31,787.70 and 8,716.24

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Solution

The fourth proportional to 21,189.34, 31,787.70 and 8,716.24 is: 13,075.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.34 : 31,787.70 = 8,716.24 : x
  2. Step 2: Convert to fraction form
    21,189.34/31,787.70 = 8,716.24/x
  3. Step 3: Cross multiply
    21,189.34x = 31,787.70 × 8,716.24
  4. Step 4: Simplify right side
    21,189.34x = 277,069,222.25
  5. Step 5: Solve for x
    x = 277,069,222.25/21,189.34
  6. Step 6: Final answer
    x = 13,075.88

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1.5x scale

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.