Home / 18,923.42-28,397.28-12,690.47

Finding the Fourth Proportional to 18,923.42, 28,397.28 and 12,690.47

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Solution

The fourth proportional to 18,923.42, 28,397.28 and 12,690.47 is: 19,043.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,923.42 : 28,397.28 = 12,690.47 : x
  2. Step 2: Convert to fraction form
    18,923.42/28,397.28 = 12,690.47/x
  3. Step 3: Cross multiply
    18,923.42x = 28,397.28 × 12,690.47
  4. Step 4: Simplify right side
    18,923.42x = 360,374,948.50
  5. Step 5: Solve for x
    x = 360,374,948.50/18,923.42
  6. Step 6: Final answer
    x = 19,043.86

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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.