Home / 20,670.10-31,005.15-10,812.40

Finding the Fourth Proportional to 20,670.10, 31,005.15 and 10,812.40

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Solution

The fourth proportional to 20,670.10, 31,005.15 and 10,812.40 is: 16,218.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.10 : 31,005.15 = 10,812.40 : x
  2. Step 2: Convert to fraction form
    20,670.10/31,005.15 = 10,812.40/x
  3. Step 3: Cross multiply
    20,670.10x = 31,005.15 × 10,812.40
  4. Step 4: Simplify right side
    20,670.10x = 335,240,083.86
  5. Step 5: Solve for x
    x = 335,240,083.86/20,670.10
  6. Step 6: Final answer
    x = 16,218.60

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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.