Home / 21,000.45-31,500.68-15,095.55

Finding the Fourth Proportional to 21,000.45, 31,500.68 and 15,095.55

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Solution

The fourth proportional to 21,000.45, 31,500.68 and 15,095.55 is: 22,643.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.45 : 31,500.68 = 15,095.55 : x
  2. Step 2: Convert to fraction form
    21,000.45/31,500.68 = 15,095.55/x
  3. Step 3: Cross multiply
    21,000.45x = 31,500.68 × 15,095.55
  4. Step 4: Simplify right side
    21,000.45x = 475,520,014.50
  5. Step 5: Solve for x
    x = 475,520,014.50/21,000.45
  6. Step 6: Final answer
    x = 22,643.33

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Half scale
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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.