Home / 21,122.04-29,146.42-12,622.47

Finding the Fourth Proportional to 21,122.04, 29,146.42 and 12,622.47

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Solution

The fourth proportional to 21,122.04, 29,146.42 and 12,622.47 is: 17,417.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.04 : 29,146.42 = 12,622.47 : x
  2. Step 2: Convert to fraction form
    21,122.04/29,146.42 = 12,622.47/x
  3. Step 3: Cross multiply
    21,122.04x = 29,146.42 × 12,622.47
  4. Step 4: Simplify right side
    21,122.04x = 367,899,812.06
  5. Step 5: Solve for x
    x = 367,899,812.06/21,122.04
  6. Step 6: Final answer
    x = 17,417.82

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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.