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Finding the Fourth Proportional to 18,840.81, 28,259.28 and 9,477.02

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Solution

The fourth proportional to 18,840.81, 28,259.28 and 9,477.02 is: 14,214.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,840.81 : 28,259.28 = 9,477.02 : x
  2. Step 2: Convert to fraction form
    18,840.81/28,259.28 = 9,477.02/x
  3. Step 3: Cross multiply
    18,840.81x = 28,259.28 × 9,477.02
  4. Step 4: Simplify right side
    18,840.81x = 267,813,620.45
  5. Step 5: Solve for x
    x = 267,813,620.45/18,840.81
  6. Step 6: Final answer
    x = 14,214.55

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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.