Home / 28,299.27-42,591-21,315.45

Finding the Fourth Proportional to 28,299.27, 42,591 and 21,315.45

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Solution

The fourth proportional to 28,299.27, 42,591 and 21,315.45 is: 32,080.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,299.27 : 42,591 = 21,315.45 : x
  2. Step 2: Convert to fraction form
    28,299.27/42,591 = 21,315.45/x
  3. Step 3: Cross multiply
    28,299.27x = 42,591 × 21,315.45
  4. Step 4: Simplify right side
    28,299.27x = 907,846,330.95
  5. Step 5: Solve for x
    x = 907,846,330.95/28,299.27
  6. Step 6: Final answer
    x = 32,080.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.