Home / 20,883.09-31,319.76-9,779.22

Finding the Fourth Proportional to 20,883.09, 31,319.76 and 9,779.22

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Solution

The fourth proportional to 20,883.09, 31,319.76 and 9,779.22 is: 14,666.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,883.09 : 31,319.76 = 9,779.22 : x
  2. Step 2: Convert to fraction form
    20,883.09/31,319.76 = 9,779.22/x
  3. Step 3: Cross multiply
    20,883.09x = 31,319.76 × 9,779.22
  4. Step 4: Simplify right side
    20,883.09x = 306,282,823.39
  5. Step 5: Solve for x
    x = 306,282,823.39/20,883.09
  6. Step 6: Final answer
    x = 14,666.55

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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.