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Finding the Fourth Proportional to 42,908.50, 64,362.84 and 18,284.50

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Solution

The fourth proportional to 42,908.50, 64,362.84 and 18,284.50 is: 27,426.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,908.50 : 64,362.84 = 18,284.50 : x
  2. Step 2: Convert to fraction form
    42,908.50/64,362.84 = 18,284.50/x
  3. Step 3: Cross multiply
    42,908.50x = 64,362.84 × 18,284.50
  4. Step 4: Simplify right side
    42,908.50x = 1,176,842,347.98
  5. Step 5: Solve for x
    x = 1,176,842,347.98/42,908.50
  6. Step 6: Final answer
    x = 27,426.79

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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.