Home / 21,969.47-30,320.04-12,539.45

Finding the Fourth Proportional to 21,969.47, 30,320.04 and 12,539.45

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Solution

The fourth proportional to 21,969.47, 30,320.04 and 12,539.45 is: 17,305.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,969.47 : 30,320.04 = 12,539.45 : x
  2. Step 2: Convert to fraction form
    21,969.47/30,320.04 = 12,539.45/x
  3. Step 3: Cross multiply
    21,969.47x = 30,320.04 × 12,539.45
  4. Step 4: Simplify right side
    21,969.47x = 380,196,473.98
  5. Step 5: Solve for x
    x = 380,196,473.98/21,969.47
  6. Step 6: Final answer
    x = 17,305.68

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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.