Home / 20,971.13-31,471.26-13,557.20

Finding the Fourth Proportional to 20,971.13, 31,471.26 and 13,557.20

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Solution

The fourth proportional to 20,971.13, 31,471.26 and 13,557.20 is: 20,345.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.13 : 31,471.26 = 13,557.20 : x
  2. Step 2: Convert to fraction form
    20,971.13/31,471.26 = 13,557.20/x
  3. Step 3: Cross multiply
    20,971.13x = 31,471.26 × 13,557.20
  4. Step 4: Simplify right side
    20,971.13x = 426,662,008.72
  5. Step 5: Solve for x
    x = 426,662,008.72/20,971.13
  6. Step 6: Final answer
    x = 20,345.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.