Home / 20,865.47-31,281.96-10,328.22

Finding the Fourth Proportional to 20,865.47, 31,281.96 and 10,328.22

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Solution

The fourth proportional to 20,865.47, 31,281.96 and 10,328.22 is: 15,484.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.47 : 31,281.96 = 10,328.22 : x
  2. Step 2: Convert to fraction form
    20,865.47/31,281.96 = 10,328.22/x
  3. Step 3: Cross multiply
    20,865.47x = 31,281.96 × 10,328.22
  4. Step 4: Simplify right side
    20,865.47x = 323,086,964.91
  5. Step 5: Solve for x
    x = 323,086,964.91/20,865.47
  6. Step 6: Final answer
    x = 15,484.29

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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.