Home / 20,971.83-31,434.93-10,449.63

Finding the Fourth Proportional to 20,971.83, 31,434.93 and 10,449.63

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Solution

The fourth proportional to 20,971.83, 31,434.93 and 10,449.63 is: 15,663.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.83 : 31,434.93 = 10,449.63 : x
  2. Step 2: Convert to fraction form
    20,971.83/31,434.93 = 10,449.63/x
  3. Step 3: Cross multiply
    20,971.83x = 31,434.93 × 10,449.63
  4. Step 4: Simplify right side
    20,971.83x = 328,483,230.40
  5. Step 5: Solve for x
    x = 328,483,230.40/20,971.83
  6. Step 6: Final answer
    x = 15,663.07

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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.