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Finding the Fourth Proportional to 19,315.71, 28,945.62 and 9,443.84

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Solution

The fourth proportional to 19,315.71, 28,945.62 and 9,443.84 is: 14,152.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,315.71 : 28,945.62 = 9,443.84 : x
  2. Step 2: Convert to fraction form
    19,315.71/28,945.62 = 9,443.84/x
  3. Step 3: Cross multiply
    19,315.71x = 28,945.62 × 9,443.84
  4. Step 4: Simplify right side
    19,315.71x = 273,357,659.25
  5. Step 5: Solve for x
    x = 273,357,659.25/19,315.71
  6. Step 6: Final answer
    x = 14,152.09

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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.