Home / 28,135.68-38,829.96-18,707.28

Finding the Fourth Proportional to 28,135.68, 38,829.96 and 18,707.28

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Solution

The fourth proportional to 28,135.68, 38,829.96 and 18,707.28 is: 25,817.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,135.68 : 38,829.96 = 18,707.28 : x
  2. Step 2: Convert to fraction form
    28,135.68/38,829.96 = 18,707.28/x
  3. Step 3: Cross multiply
    28,135.68x = 38,829.96 × 18,707.28
  4. Step 4: Simplify right side
    28,135.68x = 726,402,934.11
  5. Step 5: Solve for x
    x = 726,402,934.11/28,135.68
  6. Step 6: Final answer
    x = 25,817.86

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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.