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Finding the Fourth Proportional to 18,888.93, 28,333.86 and 8,356.71

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Solution

The fourth proportional to 18,888.93, 28,333.86 and 8,356.71 is: 12,535.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,888.93 : 28,333.86 = 8,356.71 : x
  2. Step 2: Convert to fraction form
    18,888.93/28,333.86 = 8,356.71/x
  3. Step 3: Cross multiply
    18,888.93x = 28,333.86 × 8,356.71
  4. Step 4: Simplify right side
    18,888.93x = 236,777,851.20
  5. Step 5: Solve for x
    x = 236,777,851.20/18,888.93
  6. Step 6: Final answer
    x = 12,535.27

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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.