Home / 20,407.43-28,158.70-11,455.31

Finding the Fourth Proportional to 20,407.43, 28,158.70 and 11,455.31

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Solution

The fourth proportional to 20,407.43, 28,158.70 and 11,455.31 is: 15,806.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,407.43 : 28,158.70 = 11,455.31 : x
  2. Step 2: Convert to fraction form
    20,407.43/28,158.70 = 11,455.31/x
  3. Step 3: Cross multiply
    20,407.43x = 28,158.70 × 11,455.31
  4. Step 4: Simplify right side
    20,407.43x = 322,566,637.70
  5. Step 5: Solve for x
    x = 322,566,637.70/20,407.43
  6. Step 6: Final answer
    x = 15,806.33

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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.