Home / 21,219.15-31,798.55-15,628.53

Finding the Fourth Proportional to 21,219.15, 31,798.55 and 15,628.53

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Solution

The fourth proportional to 21,219.15, 31,798.55 and 15,628.53 is: 23,420.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.15 : 31,798.55 = 15,628.53 : x
  2. Step 2: Convert to fraction form
    21,219.15/31,798.55 = 15,628.53/x
  3. Step 3: Cross multiply
    21,219.15x = 31,798.55 × 15,628.53
  4. Step 4: Simplify right side
    21,219.15x = 496,964,514.49
  5. Step 5: Solve for x
    x = 496,964,514.49/21,219.15
  6. Step 6: Final answer
    x = 23,420.57

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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.