Home / 42,757.84-64,142.80-13,178.08

Finding the Fourth Proportional to 42,757.84, 64,142.80 and 13,178.08

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Solution

The fourth proportional to 42,757.84, 64,142.80 and 13,178.08 is: 19,768.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,757.84 : 64,142.80 = 13,178.08 : x
  2. Step 2: Convert to fraction form
    42,757.84/64,142.80 = 13,178.08/x
  3. Step 3: Cross multiply
    42,757.84x = 64,142.80 × 13,178.08
  4. Step 4: Simplify right side
    42,757.84x = 845,278,949.82
  5. Step 5: Solve for x
    x = 845,278,949.82/42,757.84
  6. Step 6: Final answer
    x = 19,768.98

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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.