Home / 12,421.08-17,142.30-9,271.80

Finding the Fourth Proportional to 12,421.08, 17,142.30 and 9,271.80

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Solution

The fourth proportional to 12,421.08, 17,142.30 and 9,271.80 is: 12,795.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,421.08 : 17,142.30 = 9,271.80 : x
  2. Step 2: Convert to fraction form
    12,421.08/17,142.30 = 9,271.80/x
  3. Step 3: Cross multiply
    12,421.08x = 17,142.30 × 9,271.80
  4. Step 4: Simplify right side
    12,421.08x = 158,939,977.14
  5. Step 5: Solve for x
    x = 158,939,977.14/12,421.08
  6. Step 6: Final answer
    x = 12,795.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.