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Finding the Fourth Proportional to 28,353.60, 42,742.80 and 26,450.64

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Solution

The fourth proportional to 28,353.60, 42,742.80 and 26,450.64 is: 39,874.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,353.60 : 42,742.80 = 26,450.64 : x
  2. Step 2: Convert to fraction form
    28,353.60/42,742.80 = 26,450.64/x
  3. Step 3: Cross multiply
    28,353.60x = 42,742.80 × 26,450.64
  4. Step 4: Simplify right side
    28,353.60x = 1,130,574,415.39
  5. Step 5: Solve for x
    x = 1,130,574,415.39/28,353.60
  6. Step 6: Final answer
    x = 39,874.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.