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Finding the Fourth Proportional to 19,322.40, 28,987.80 and 11,006.40

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Solution

The fourth proportional to 19,322.40, 28,987.80 and 11,006.40 is: 16,511.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,322.40 : 28,987.80 = 11,006.40 : x
  2. Step 2: Convert to fraction form
    19,322.40/28,987.80 = 11,006.40/x
  3. Step 3: Cross multiply
    19,322.40x = 28,987.80 × 11,006.40
  4. Step 4: Simplify right side
    19,322.40x = 319,051,321.92
  5. Step 5: Solve for x
    x = 319,051,321.92/19,322.40
  6. Step 6: Final answer
    x = 16,511.99

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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.