Home / 21,969.95-30,319.07-12,539.39

Finding the Fourth Proportional to 21,969.95, 30,319.07 and 12,539.39

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Solution

The fourth proportional to 21,969.95, 30,319.07 and 12,539.39 is: 17,304.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,969.95 : 30,319.07 = 12,539.39 : x
  2. Step 2: Convert to fraction form
    21,969.95/30,319.07 = 12,539.39/x
  3. Step 3: Cross multiply
    21,969.95x = 30,319.07 × 12,539.39
  4. Step 4: Simplify right side
    21,969.95x = 380,182,428.88
  5. Step 5: Solve for x
    x = 380,182,428.88/21,969.95
  6. Step 6: Final answer
    x = 17,304.66

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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.