Home / 21,228.67-29,295.84-12,276.55

Finding the Fourth Proportional to 21,228.67, 29,295.84 and 12,276.55

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Solution

The fourth proportional to 21,228.67, 29,295.84 and 12,276.55 is: 16,941.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.67 : 29,295.84 = 12,276.55 : x
  2. Step 2: Convert to fraction form
    21,228.67/29,295.84 = 12,276.55/x
  3. Step 3: Cross multiply
    21,228.67x = 29,295.84 × 12,276.55
  4. Step 4: Simplify right side
    21,228.67x = 359,651,844.55
  5. Step 5: Solve for x
    x = 359,651,844.55/21,228.67
  6. Step 6: Final answer
    x = 16,941.80

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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.