Home / 21,940.52-30,278.12-12,509.69

Finding the Fourth Proportional to 21,940.52, 30,278.12 and 12,509.69

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Solution

The fourth proportional to 21,940.52, 30,278.12 and 12,509.69 is: 17,263.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,940.52 : 30,278.12 = 12,509.69 : x
  2. Step 2: Convert to fraction form
    21,940.52/30,278.12 = 12,509.69/x
  3. Step 3: Cross multiply
    21,940.52x = 30,278.12 × 12,509.69
  4. Step 4: Simplify right side
    21,940.52x = 378,769,681.04
  5. Step 5: Solve for x
    x = 378,769,681.04/21,940.52
  6. Step 6: Final answer
    x = 17,263.48

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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.