Home / 21,230.81-29,301.21-12,276.58

Finding the Fourth Proportional to 21,230.81, 29,301.21 and 12,276.58

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Solution

The fourth proportional to 21,230.81, 29,301.21 and 12,276.58 is: 16,943.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,230.81 : 29,301.21 = 12,276.58 : x
  2. Step 2: Convert to fraction form
    21,230.81/29,301.21 = 12,276.58/x
  3. Step 3: Cross multiply
    21,230.81x = 29,301.21 × 12,276.58
  4. Step 4: Simplify right side
    21,230.81x = 359,718,648.66
  5. Step 5: Solve for x
    x = 359,718,648.66/21,230.81
  6. Step 6: Final answer
    x = 16,943.24

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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.