Home / 42,776.17-64,167.68-12,788.21

Finding the Fourth Proportional to 42,776.17, 64,167.68 and 12,788.21

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Solution

The fourth proportional to 42,776.17, 64,167.68 and 12,788.21 is: 19,183.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,776.17 : 64,167.68 = 12,788.21 : x
  2. Step 2: Convert to fraction form
    42,776.17/64,167.68 = 12,788.21/x
  3. Step 3: Cross multiply
    42,776.17x = 64,167.68 × 12,788.21
  4. Step 4: Simplify right side
    42,776.17x = 820,589,887.51
  5. Step 5: Solve for x
    x = 820,589,887.51/42,776.17
  6. Step 6: Final answer
    x = 19,183.34

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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.