Home / 21,859.12-32,821.48-12,509.70

Finding the Fourth Proportional to 21,859.12, 32,821.48 and 12,509.70

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Solution

The fourth proportional to 21,859.12, 32,821.48 and 12,509.70 is: 18,783.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,859.12 : 32,821.48 = 12,509.70 : x
  2. Step 2: Convert to fraction form
    21,859.12/32,821.48 = 12,509.70/x
  3. Step 3: Cross multiply
    21,859.12x = 32,821.48 × 12,509.70
  4. Step 4: Simplify right side
    21,859.12x = 410,586,704.25
  5. Step 5: Solve for x
    x = 410,586,704.25/21,859.12
  6. Step 6: Final answer
    x = 18,783.31

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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.