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Finding the Fourth Proportional to 42,486.80, 63,736.32 and 14,409.32

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Solution

The fourth proportional to 42,486.80, 63,736.32 and 14,409.32 is: 21,616.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,486.80 : 63,736.32 = 14,409.32 : x
  2. Step 2: Convert to fraction form
    42,486.80/63,736.32 = 14,409.32/x
  3. Step 3: Cross multiply
    42,486.80x = 63,736.32 × 14,409.32
  4. Step 4: Simplify right side
    42,486.80x = 918,397,030.50
  5. Step 5: Solve for x
    x = 918,397,030.50/42,486.80
  6. Step 6: Final answer
    x = 21,616.06

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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.