Home / 20,842.48-31,216.20-13,031.92

Finding the Fourth Proportional to 20,842.48, 31,216.20 and 13,031.92

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Solution

The fourth proportional to 20,842.48, 31,216.20 and 13,031.92 is: 19,518.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,842.48 : 31,216.20 = 13,031.92 : x
  2. Step 2: Convert to fraction form
    20,842.48/31,216.20 = 13,031.92/x
  3. Step 3: Cross multiply
    20,842.48x = 31,216.20 × 13,031.92
  4. Step 4: Simplify right side
    20,842.48x = 406,807,021.10
  5. Step 5: Solve for x
    x = 406,807,021.10/20,842.48
  6. Step 6: Final answer
    x = 19,518.17

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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.