Home / 21,810.30-32,715.45-18,537.90

Finding the Fourth Proportional to 21,810.30, 32,715.45 and 18,537.90

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Solution

The fourth proportional to 21,810.30, 32,715.45 and 18,537.90 is: 27,806.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,810.30 : 32,715.45 = 18,537.90 : x
  2. Step 2: Convert to fraction form
    21,810.30/32,715.45 = 18,537.90/x
  3. Step 3: Cross multiply
    21,810.30x = 32,715.45 × 18,537.90
  4. Step 4: Simplify right side
    21,810.30x = 606,475,740.56
  5. Step 5: Solve for x
    x = 606,475,740.56/21,810.30
  6. Step 6: Final answer
    x = 27,806.85

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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.