Home / 21,121.04-29,145.05-12,621.47

Finding the Fourth Proportional to 21,121.04, 29,145.05 and 12,621.47

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Solution

The fourth proportional to 21,121.04, 29,145.05 and 12,621.47 is: 17,416.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.04 : 29,145.05 = 12,621.47 : x
  2. Step 2: Convert to fraction form
    21,121.04/29,145.05 = 12,621.47/x
  3. Step 3: Cross multiply
    21,121.04x = 29,145.05 × 12,621.47
  4. Step 4: Simplify right side
    21,121.04x = 367,853,165.39
  5. Step 5: Solve for x
    x = 367,853,165.39/21,121.04
  6. Step 6: Final answer
    x = 17,416.44

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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.