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Finding the Fourth Proportional to 18,909.96, 28,364.95 and 5,762.34

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Solution

The fourth proportional to 18,909.96, 28,364.95 and 5,762.34 is: 8,643.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,909.96 : 28,364.95 = 5,762.34 : x
  2. Step 2: Convert to fraction form
    18,909.96/28,364.95 = 5,762.34/x
  3. Step 3: Cross multiply
    18,909.96x = 28,364.95 × 5,762.34
  4. Step 4: Simplify right side
    18,909.96x = 163,448,485.98
  5. Step 5: Solve for x
    x = 163,448,485.98/18,909.96
  6. Step 6: Final answer
    x = 8,643.51

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Similar ratio
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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.