Home / 21,220.89-29,282.51-12,267.05

Finding the Fourth Proportional to 21,220.89, 29,282.51 and 12,267.05

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Solution

The fourth proportional to 21,220.89, 29,282.51 and 12,267.05 is: 16,927.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,220.89 : 29,282.51 = 12,267.05 : x
  2. Step 2: Convert to fraction form
    21,220.89/29,282.51 = 12,267.05/x
  3. Step 3: Cross multiply
    21,220.89x = 29,282.51 × 12,267.05
  4. Step 4: Simplify right side
    21,220.89x = 359,209,898.55
  5. Step 5: Solve for x
    x = 359,209,898.55/21,220.89
  6. Step 6: Final answer
    x = 16,927.19

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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.