Home / 12,920.80-19,369.68-5,124.28

Finding the Fourth Proportional to 12,920.80, 19,369.68 and 5,124.28

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Solution

The fourth proportional to 12,920.80, 19,369.68 and 5,124.28 is: 7,681.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,920.80 : 19,369.68 = 5,124.28 : x
  2. Step 2: Convert to fraction form
    12,920.80/19,369.68 = 5,124.28/x
  3. Step 3: Cross multiply
    12,920.80x = 19,369.68 × 5,124.28
  4. Step 4: Simplify right side
    12,920.80x = 99,255,663.83
  5. Step 5: Solve for x
    x = 99,255,663.83/12,920.80
  6. Step 6: Final answer
    x = 7,681.85

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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.