Home / 20,510.15-28,304.37-12,018.38

Finding the Fourth Proportional to 20,510.15, 28,304.37 and 12,018.38

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Solution

The fourth proportional to 20,510.15, 28,304.37 and 12,018.38 is: 16,585.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.15 : 28,304.37 = 12,018.38 : x
  2. Step 2: Convert to fraction form
    20,510.15/28,304.37 = 12,018.38/x
  3. Step 3: Cross multiply
    20,510.15x = 28,304.37 × 12,018.38
  4. Step 4: Simplify right side
    20,510.15x = 340,172,532.80
  5. Step 5: Solve for x
    x = 340,172,532.80/20,510.15
  6. Step 6: Final answer
    x = 16,585.57

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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.