Home / 12,921.80-19,390.89-5,532.47

Finding the Fourth Proportional to 12,921.80, 19,390.89 and 5,532.47

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Solution

The fourth proportional to 12,921.80, 19,390.89 and 5,532.47 is: 8,302.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,921.80 : 19,390.89 = 5,532.47 : x
  2. Step 2: Convert to fraction form
    12,921.80/19,390.89 = 5,532.47/x
  3. Step 3: Cross multiply
    12,921.80x = 19,390.89 × 5,532.47
  4. Step 4: Simplify right side
    12,921.80x = 107,279,420.24
  5. Step 5: Solve for x
    x = 107,279,420.24/12,921.80
  6. Step 6: Final answer
    x = 8,302.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.