Home / 21,743.69-30,005.45-12,312.28

Finding the Fourth Proportional to 21,743.69, 30,005.45 and 12,312.28

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Solution

The fourth proportional to 21,743.69, 30,005.45 and 12,312.28 is: 16,990.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,743.69 : 30,005.45 = 12,312.28 : x
  2. Step 2: Convert to fraction form
    21,743.69/30,005.45 = 12,312.28/x
  3. Step 3: Cross multiply
    21,743.69x = 30,005.45 × 12,312.28
  4. Step 4: Simplify right side
    21,743.69x = 369,435,351.90
  5. Step 5: Solve for x
    x = 369,435,351.90/21,743.69
  6. Step 6: Final answer
    x = 16,990.46

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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.