Home / 21,000.80-31,501.20-18,267.05

Finding the Fourth Proportional to 21,000.80, 31,501.20 and 18,267.05

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Solution

The fourth proportional to 21,000.80, 31,501.20 and 18,267.05 is: 27,400.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.80 : 31,501.20 = 18,267.05 : x
  2. Step 2: Convert to fraction form
    21,000.80/31,501.20 = 18,267.05/x
  3. Step 3: Cross multiply
    21,000.80x = 31,501.20 × 18,267.05
  4. Step 4: Simplify right side
    21,000.80x = 575,433,995.46
  5. Step 5: Solve for x
    x = 575,433,995.46/21,000.80
  6. Step 6: Final answer
    x = 27,400.58

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Similar ratio
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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.