Home / 21,215.29-29,281.43-12,261.55

Finding the Fourth Proportional to 21,215.29, 29,281.43 and 12,261.55

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Solution

The fourth proportional to 21,215.29, 29,281.43 and 12,261.55 is: 16,923.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.29 : 29,281.43 = 12,261.55 : x
  2. Step 2: Convert to fraction form
    21,215.29/29,281.43 = 12,261.55/x
  3. Step 3: Cross multiply
    21,215.29x = 29,281.43 × 12,261.55
  4. Step 4: Simplify right side
    21,215.29x = 359,035,510.30
  5. Step 5: Solve for x
    x = 359,035,510.30/21,215.29
  6. Step 6: Final answer
    x = 16,923.44

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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.