Home / 28,779.66-39,713.06-21,230.08

Finding the Fourth Proportional to 28,779.66, 39,713.06 and 21,230.08

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Solution

The fourth proportional to 28,779.66, 39,713.06 and 21,230.08 is: 29,295.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,779.66 : 39,713.06 = 21,230.08 : x
  2. Step 2: Convert to fraction form
    28,779.66/39,713.06 = 21,230.08/x
  3. Step 3: Cross multiply
    28,779.66x = 39,713.06 × 21,230.08
  4. Step 4: Simplify right side
    28,779.66x = 843,111,440.84
  5. Step 5: Solve for x
    x = 843,111,440.84/28,779.66
  6. Step 6: Final answer
    x = 29,295.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.