Home / 21,420.20-32,130.30-11,052.20

Finding the Fourth Proportional to 21,420.20, 32,130.30 and 11,052.20

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Solution

The fourth proportional to 21,420.20, 32,130.30 and 11,052.20 is: 16,578.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420.20 : 32,130.30 = 11,052.20 : x
  2. Step 2: Convert to fraction form
    21,420.20/32,130.30 = 11,052.20/x
  3. Step 3: Cross multiply
    21,420.20x = 32,130.30 × 11,052.20
  4. Step 4: Simplify right side
    21,420.20x = 355,110,501.66
  5. Step 5: Solve for x
    x = 355,110,501.66/21,420.20
  6. Step 6: Final answer
    x = 16,578.30

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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.