Home / 20,890.29-31,316.25-9,036.66

Finding the Fourth Proportional to 20,890.29, 31,316.25 and 9,036.66

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Solution

The fourth proportional to 20,890.29, 31,316.25 and 9,036.66 is: 13,546.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.29 : 31,316.25 = 9,036.66 : x
  2. Step 2: Convert to fraction form
    20,890.29/31,316.25 = 9,036.66/x
  3. Step 3: Cross multiply
    20,890.29x = 31,316.25 × 9,036.66
  4. Step 4: Simplify right side
    20,890.29x = 282,994,303.73
  5. Step 5: Solve for x
    x = 282,994,303.73/20,890.29
  6. Step 6: Final answer
    x = 13,546.69

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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.