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Finding the Fourth Proportional to 19,089.52, 28,605.05 and 7,990.16

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Solution

The fourth proportional to 19,089.52, 28,605.05 and 7,990.16 is: 11,973.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,089.52 : 28,605.05 = 7,990.16 : x
  2. Step 2: Convert to fraction form
    19,089.52/28,605.05 = 7,990.16/x
  3. Step 3: Cross multiply
    19,089.52x = 28,605.05 × 7,990.16
  4. Step 4: Simplify right side
    19,089.52x = 228,558,952.08
  5. Step 5: Solve for x
    x = 228,558,952.08/19,089.52
  6. Step 6: Final answer
    x = 11,973.01

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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.