Home / 12,921.80-19,295.18-10,259.43

Finding the Fourth Proportional to 12,921.80, 19,295.18 and 10,259.43

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Solution

The fourth proportional to 12,921.80, 19,295.18 and 10,259.43 is: 15,319.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,921.80 : 19,295.18 = 10,259.43 : x
  2. Step 2: Convert to fraction form
    12,921.80/19,295.18 = 10,259.43/x
  3. Step 3: Cross multiply
    12,921.80x = 19,295.18 × 10,259.43
  4. Step 4: Simplify right side
    12,921.80x = 197,957,497.25
  5. Step 5: Solve for x
    x = 197,957,497.25/12,921.80
  6. Step 6: Final answer
    x = 15,319.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.