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Finding the Fourth Proportional to 28,318.40, 42,477.60 and 14,494.40

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Solution

The fourth proportional to 28,318.40, 42,477.60 and 14,494.40 is: 21,741.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,318.40 : 42,477.60 = 14,494.40 : x
  2. Step 2: Convert to fraction form
    28,318.40/42,477.60 = 14,494.40/x
  3. Step 3: Cross multiply
    28,318.40x = 42,477.60 × 14,494.40
  4. Step 4: Simplify right side
    28,318.40x = 615,687,325.44
  5. Step 5: Solve for x
    x = 615,687,325.44/28,318.40
  6. Step 6: Final answer
    x = 21,741.60

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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.