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Finding the Fourth Proportional to 18,703.40, 28,032.90 and 9,933.80

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Solution

The fourth proportional to 18,703.40, 28,032.90 and 9,933.80 is: 14,888.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.40 : 28,032.90 = 9,933.80 : x
  2. Step 2: Convert to fraction form
    18,703.40/28,032.90 = 9,933.80/x
  3. Step 3: Cross multiply
    18,703.40x = 28,032.90 × 9,933.80
  4. Step 4: Simplify right side
    18,703.40x = 278,473,222.02
  5. Step 5: Solve for x
    x = 278,473,222.02/18,703.40
  6. Step 6: Final answer
    x = 14,888.91

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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.