Home / 28,439.72-39,225.66-20,883.68

Finding the Fourth Proportional to 28,439.72, 39,225.66 and 20,883.68

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Solution

The fourth proportional to 28,439.72, 39,225.66 and 20,883.68 is: 28,803.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,439.72 : 39,225.66 = 20,883.68 : x
  2. Step 2: Convert to fraction form
    28,439.72/39,225.66 = 20,883.68/x
  3. Step 3: Cross multiply
    28,439.72x = 39,225.66 × 20,883.68
  4. Step 4: Simplify right side
    28,439.72x = 819,176,131.23
  5. Step 5: Solve for x
    x = 819,176,131.23/28,439.72
  6. Step 6: Final answer
    x = 28,803.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.