Home / 21,271.99-29,357.07-12,319.66

Finding the Fourth Proportional to 21,271.99, 29,357.07 and 12,319.66

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Solution

The fourth proportional to 21,271.99, 29,357.07 and 12,319.66 is: 17,002.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.99 : 29,357.07 = 12,319.66 : x
  2. Step 2: Convert to fraction form
    21,271.99/29,357.07 = 12,319.66/x
  3. Step 3: Cross multiply
    21,271.99x = 29,357.07 × 12,319.66
  4. Step 4: Simplify right side
    21,271.99x = 361,669,121.00
  5. Step 5: Solve for x
    x = 361,669,121.00/21,271.99
  6. Step 6: Final answer
    x = 17,002.13

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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.