Home / 21,368.20-32,013.90-18,910.60

Finding the Fourth Proportional to 21,368.20, 32,013.90 and 18,910.60

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Solution

The fourth proportional to 21,368.20, 32,013.90 and 18,910.60 is: 28,331.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,368.20 : 32,013.90 = 18,910.60 : x
  2. Step 2: Convert to fraction form
    21,368.20/32,013.90 = 18,910.60/x
  3. Step 3: Cross multiply
    21,368.20x = 32,013.90 × 18,910.60
  4. Step 4: Simplify right side
    21,368.20x = 605,402,057.34
  5. Step 5: Solve for x
    x = 605,402,057.34/21,368.20
  6. Step 6: Final answer
    x = 28,331.92

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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.