Home / 20,764.20-31,156.02-9,075.90

Finding the Fourth Proportional to 20,764.20, 31,156.02 and 9,075.90

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Solution

The fourth proportional to 20,764.20, 31,156.02 and 9,075.90 is: 13,618.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.20 : 31,156.02 = 9,075.90 : x
  2. Step 2: Convert to fraction form
    20,764.20/31,156.02 = 9,075.90/x
  3. Step 3: Cross multiply
    20,764.20x = 31,156.02 × 9,075.90
  4. Step 4: Simplify right side
    20,764.20x = 282,768,921.92
  5. Step 5: Solve for x
    x = 282,768,921.92/20,764.20
  6. Step 6: Final answer
    x = 13,618.10

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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.