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Finding the Fourth Proportional to 15,309.21, 22,941.91 and 8,721.80

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Solution

The fourth proportional to 15,309.21, 22,941.91 and 8,721.80 is: 13,070.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,309.21 : 22,941.91 = 8,721.80 : x
  2. Step 2: Convert to fraction form
    15,309.21/22,941.91 = 8,721.80/x
  3. Step 3: Cross multiply
    15,309.21x = 22,941.91 × 8,721.80
  4. Step 4: Simplify right side
    15,309.21x = 200,094,750.64
  5. Step 5: Solve for x
    x = 200,094,750.64/15,309.21
  6. Step 6: Final answer
    x = 13,070.22

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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.