Home / 20,712.51-31,081.05-10,857.34

Finding the Fourth Proportional to 20,712.51, 31,081.05 and 10,857.34

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Solution

The fourth proportional to 20,712.51, 31,081.05 and 10,857.34 is: 16,292.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.51 : 31,081.05 = 10,857.34 : x
  2. Step 2: Convert to fraction form
    20,712.51/31,081.05 = 10,857.34/x
  3. Step 3: Cross multiply
    20,712.51x = 31,081.05 × 10,857.34
  4. Step 4: Simplify right side
    20,712.51x = 337,457,566.26
  5. Step 5: Solve for x
    x = 337,457,566.26/20,712.51
  6. Step 6: Final answer
    x = 16,292.45

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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.