Home / 20,687.10-31,030.65-10,829.40

Finding the Fourth Proportional to 20,687.10, 31,030.65 and 10,829.40

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Solution

The fourth proportional to 20,687.10, 31,030.65 and 10,829.40 is: 16,244.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.10 : 31,030.65 = 10,829.40 : x
  2. Step 2: Convert to fraction form
    20,687.10/31,030.65 = 10,829.40/x
  3. Step 3: Cross multiply
    20,687.10x = 31,030.65 × 10,829.40
  4. Step 4: Simplify right side
    20,687.10x = 336,043,321.11
  5. Step 5: Solve for x
    x = 336,043,321.11/20,687.10
  6. Step 6: Final answer
    x = 16,244.10

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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.