Home / 20,637.31-28,480.10-11,206.48

Finding the Fourth Proportional to 20,637.31, 28,480.10 and 11,206.48

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Solution

The fourth proportional to 20,637.31, 28,480.10 and 11,206.48 is: 15,465.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,637.31 : 28,480.10 = 11,206.48 : x
  2. Step 2: Convert to fraction form
    20,637.31/28,480.10 = 11,206.48/x
  3. Step 3: Cross multiply
    20,637.31x = 28,480.10 × 11,206.48
  4. Step 4: Simplify right side
    20,637.31x = 319,161,671.05
  5. Step 5: Solve for x
    x = 319,161,671.05/20,637.31
  6. Step 6: Final answer
    x = 15,465.27

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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.