Home / 20,790.18-31,188.35-7,641.53

Finding the Fourth Proportional to 20,790.18, 31,188.35 and 7,641.53

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Solution

The fourth proportional to 20,790.18, 31,188.35 and 7,641.53 is: 11,463.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.18 : 31,188.35 = 7,641.53 : x
  2. Step 2: Convert to fraction form
    20,790.18/31,188.35 = 7,641.53/x
  3. Step 3: Cross multiply
    20,790.18x = 31,188.35 × 7,641.53
  4. Step 4: Simplify right side
    20,790.18x = 238,326,575.34
  5. Step 5: Solve for x
    x = 238,326,575.34/20,790.18
  6. Step 6: Final answer
    x = 11,463.42

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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.