Home / 21,333.12-31,994.90-11,977.32

Finding the Fourth Proportional to 21,333.12, 31,994.90 and 11,977.32

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Solution

The fourth proportional to 21,333.12, 31,994.90 and 11,977.32 is: 17,963.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,333.12 : 31,994.90 = 11,977.32 : x
  2. Step 2: Convert to fraction form
    21,333.12/31,994.90 = 11,977.32/x
  3. Step 3: Cross multiply
    21,333.12x = 31,994.90 × 11,977.32
  4. Step 4: Simplify right side
    21,333.12x = 383,213,080.71
  5. Step 5: Solve for x
    x = 383,213,080.71/21,333.12
  6. Step 6: Final answer
    x = 17,963.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.