Home / 21,056.09-31,567.36-12,161.30

Finding the Fourth Proportional to 21,056.09, 31,567.36 and 12,161.30

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Solution

The fourth proportional to 21,056.09, 31,567.36 and 12,161.30 is: 18,232.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,056.09 : 31,567.36 = 12,161.30 : x
  2. Step 2: Convert to fraction form
    21,056.09/31,567.36 = 12,161.30/x
  3. Step 3: Cross multiply
    21,056.09x = 31,567.36 × 12,161.30
  4. Step 4: Simplify right side
    21,056.09x = 383,900,135.17
  5. Step 5: Solve for x
    x = 383,900,135.17/21,056.09
  6. Step 6: Final answer
    x = 18,232.26

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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.