Home / 20,678.10-31,007.55-8,985.30

Finding the Fourth Proportional to 20,678.10, 31,007.55 and 8,985.30

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Solution

The fourth proportional to 20,678.10, 31,007.55 and 8,985.30 is: 13,473.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.10 : 31,007.55 = 8,985.30 : x
  2. Step 2: Convert to fraction form
    20,678.10/31,007.55 = 8,985.30/x
  3. Step 3: Cross multiply
    20,678.10x = 31,007.55 × 8,985.30
  4. Step 4: Simplify right side
    20,678.10x = 278,612,139.02
  5. Step 5: Solve for x
    x = 278,612,139.02/20,678.10
  6. Step 6: Final answer
    x = 13,473.78

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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.