Home / 18,838.81-28,206.28-12,590.20

Finding the Fourth Proportional to 18,838.81, 28,206.28 and 12,590.20

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Solution

The fourth proportional to 18,838.81, 28,206.28 and 12,590.20 is: 18,850.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,838.81 : 28,206.28 = 12,590.20 : x
  2. Step 2: Convert to fraction form
    18,838.81/28,206.28 = 12,590.20/x
  3. Step 3: Cross multiply
    18,838.81x = 28,206.28 × 12,590.20
  4. Step 4: Simplify right side
    18,838.81x = 355,122,706.46
  5. Step 5: Solve for x
    x = 355,122,706.46/18,838.81
  6. Step 6: Final answer
    x = 18,850.59

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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.