Home / 21,969.09-30,319.52-12,539.07

Finding the Fourth Proportional to 21,969.09, 30,319.52 and 12,539.07

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Solution

The fourth proportional to 21,969.09, 30,319.52 and 12,539.07 is: 17,305.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,969.09 : 30,319.52 = 12,539.07 : x
  2. Step 2: Convert to fraction form
    21,969.09/30,319.52 = 12,539.07/x
  3. Step 3: Cross multiply
    21,969.09x = 30,319.52 × 12,539.07
  4. Step 4: Simplify right side
    21,969.09x = 380,178,520.95
  5. Step 5: Solve for x
    x = 380,178,520.95/21,969.09
  6. Step 6: Final answer
    x = 17,305.16

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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.