Home / 21,300.90-29,398.31-12,800.22

Finding the Fourth Proportional to 21,300.90, 29,398.31 and 12,800.22

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Solution

The fourth proportional to 21,300.90, 29,398.31 and 12,800.22 is: 17,666.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,300.90 : 29,398.31 = 12,800.22 : x
  2. Step 2: Convert to fraction form
    21,300.90/29,398.31 = 12,800.22/x
  3. Step 3: Cross multiply
    21,300.90x = 29,398.31 × 12,800.22
  4. Step 4: Simplify right side
    21,300.90x = 376,304,835.63
  5. Step 5: Solve for x
    x = 376,304,835.63/21,300.90
  6. Step 6: Final answer
    x = 17,666.15

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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.