Home / 20,813.59-28,726.16-15,471.51

Finding the Fourth Proportional to 20,813.59, 28,726.16 and 15,471.51

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Solution

The fourth proportional to 20,813.59, 28,726.16 and 15,471.51 is: 21,353.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813.59 : 28,726.16 = 15,471.51 : x
  2. Step 2: Convert to fraction form
    20,813.59/28,726.16 = 15,471.51/x
  3. Step 3: Cross multiply
    20,813.59x = 28,726.16 × 15,471.51
  4. Step 4: Simplify right side
    20,813.59x = 444,436,886.62
  5. Step 5: Solve for x
    x = 444,436,886.62/20,813.59
  6. Step 6: Final answer
    x = 21,353.21

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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.