Home / 21,390.20-32,075.70-8,238.20

Finding the Fourth Proportional to 21,390.20, 32,075.70 and 8,238.20

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Solution

The fourth proportional to 21,390.20, 32,075.70 and 8,238.20 is: 12,353.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.20 : 32,075.70 = 8,238.20 : x
  2. Step 2: Convert to fraction form
    21,390.20/32,075.70 = 8,238.20/x
  3. Step 3: Cross multiply
    21,390.20x = 32,075.70 × 8,238.20
  4. Step 4: Simplify right side
    21,390.20x = 264,246,031.74
  5. Step 5: Solve for x
    x = 264,246,031.74/21,390.20
  6. Step 6: Final answer
    x = 12,353.60

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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.