Home / 21,615.12-32,422.68-11,205

Finding the Fourth Proportional to 21,615.12, 32,422.68 and 11,205

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Solution

The fourth proportional to 21,615.12, 32,422.68 and 11,205 is: 16,807.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,615.12 : 32,422.68 = 11,205 : x
  2. Step 2: Convert to fraction form
    21,615.12/32,422.68 = 11,205/x
  3. Step 3: Cross multiply
    21,615.12x = 32,422.68 × 11,205
  4. Step 4: Simplify right side
    21,615.12x = 363,296,129.40
  5. Step 5: Solve for x
    x = 363,296,129.40/21,615.12
  6. Step 6: Final answer
    x = 16,807.50

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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.