Home / 20,986.07-28,963.53-12,031.83

Finding the Fourth Proportional to 20,986.07, 28,963.53 and 12,031.83

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Solution

The fourth proportional to 20,986.07, 28,963.53 and 12,031.83 is: 16,605.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.07 : 28,963.53 = 12,031.83 : x
  2. Step 2: Convert to fraction form
    20,986.07/28,963.53 = 12,031.83/x
  3. Step 3: Cross multiply
    20,986.07x = 28,963.53 × 12,031.83
  4. Step 4: Simplify right side
    20,986.07x = 348,484,269.16
  5. Step 5: Solve for x
    x = 348,484,269.16/20,986.07
  6. Step 6: Final answer
    x = 16,605.51

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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.