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Finding the Fourth Proportional to 28,068.39, 42,109.08 and 8,346.51

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Solution

The fourth proportional to 28,068.39, 42,109.08 and 8,346.51 is: 12,521.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,068.39 : 42,109.08 = 8,346.51 : x
  2. Step 2: Convert to fraction form
    28,068.39/42,109.08 = 8,346.51/x
  3. Step 3: Cross multiply
    28,068.39x = 42,109.08 × 8,346.51
  4. Step 4: Simplify right side
    28,068.39x = 351,463,857.31
  5. Step 5: Solve for x
    x = 351,463,857.31/28,068.39
  6. Step 6: Final answer
    x = 12,521.70

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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.