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Finding the Fourth Proportional to 18,904.98, 28,332.81 and 7,798.98

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Solution

The fourth proportional to 18,904.98, 28,332.81 and 7,798.98 is: 11,688.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,904.98 : 28,332.81 = 7,798.98 : x
  2. Step 2: Convert to fraction form
    18,904.98/28,332.81 = 7,798.98/x
  3. Step 3: Cross multiply
    18,904.98x = 28,332.81 × 7,798.98
  4. Step 4: Simplify right side
    18,904.98x = 220,967,018.53
  5. Step 5: Solve for x
    x = 220,967,018.53/18,904.98
  6. Step 6: Final answer
    x = 11,688.30

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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.