Home / 20,765.02-31,124.30-10,905.34

Finding the Fourth Proportional to 20,765.02, 31,124.30 and 10,905.34

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Solution

The fourth proportional to 20,765.02, 31,124.30 and 10,905.34 is: 16,345.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.02 : 31,124.30 = 10,905.34 : x
  2. Step 2: Convert to fraction form
    20,765.02/31,124.30 = 10,905.34/x
  3. Step 3: Cross multiply
    20,765.02x = 31,124.30 × 10,905.34
  4. Step 4: Simplify right side
    20,765.02x = 339,421,073.76
  5. Step 5: Solve for x
    x = 339,421,073.76/20,765.02
  6. Step 6: Final answer
    x = 16,345.81

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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.