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Finding the Fourth Proportional to 18,888.13, 28,345.05 and 7,794.77

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Solution

The fourth proportional to 18,888.13, 28,345.05 and 7,794.77 is: 11,697.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,888.13 : 28,345.05 = 7,794.77 : x
  2. Step 2: Convert to fraction form
    18,888.13/28,345.05 = 7,794.77/x
  3. Step 3: Cross multiply
    18,888.13x = 28,345.05 × 7,794.77
  4. Step 4: Simplify right side
    18,888.13x = 220,943,216.25
  5. Step 5: Solve for x
    x = 220,943,216.25/18,888.13
  6. Step 6: Final answer
    x = 11,697.47

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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.