Home / 15,221.64-21,012.33-9,255.21

Finding the Fourth Proportional to 15,221.64, 21,012.33 and 9,255.21

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Solution

The fourth proportional to 15,221.64, 21,012.33 and 9,255.21 is: 12,776.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,221.64 : 21,012.33 = 9,255.21 : x
  2. Step 2: Convert to fraction form
    15,221.64/21,012.33 = 9,255.21/x
  3. Step 3: Cross multiply
    15,221.64x = 21,012.33 × 9,255.21
  4. Step 4: Simplify right side
    15,221.64x = 194,473,526.74
  5. Step 5: Solve for x
    x = 194,473,526.74/15,221.64
  6. Step 6: Final answer
    x = 12,776.12

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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.