Home / 28,898.81-39,806.17-20,385.97

Finding the Fourth Proportional to 28,898.81, 39,806.17 and 20,385.97

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Solution

The fourth proportional to 28,898.81, 39,806.17 and 20,385.97 is: 28,080.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,898.81 : 39,806.17 = 20,385.97 : x
  2. Step 2: Convert to fraction form
    28,898.81/39,806.17 = 20,385.97/x
  3. Step 3: Cross multiply
    28,898.81x = 39,806.17 × 20,385.97
  4. Step 4: Simplify right side
    28,898.81x = 811,487,266.98
  5. Step 5: Solve for x
    x = 811,487,266.98/28,898.81
  6. Step 6: Final answer
    x = 28,080.30

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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.