Home / 20,670.40-31,009.08-6,435.52

Finding the Fourth Proportional to 20,670.40, 31,009.08 and 6,435.52

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Solution

The fourth proportional to 20,670.40, 31,009.08 and 6,435.52 is: 9,654.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.40 : 31,009.08 = 6,435.52 : x
  2. Step 2: Convert to fraction form
    20,670.40/31,009.08 = 6,435.52/x
  3. Step 3: Cross multiply
    20,670.40x = 31,009.08 × 6,435.52
  4. Step 4: Simplify right side
    20,670.40x = 199,559,554.52
  5. Step 5: Solve for x
    x = 199,559,554.52/20,670.40
  6. Step 6: Final answer
    x = 9,654.36

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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.