Home / 42,665.06-63,991.96-12,678.66

Finding the Fourth Proportional to 42,665.06, 63,991.96 and 12,678.66

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Solution

The fourth proportional to 42,665.06, 63,991.96 and 12,678.66 is: 19,016.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,665.06 : 63,991.96 = 12,678.66 : x
  2. Step 2: Convert to fraction form
    42,665.06/63,991.96 = 12,678.66/x
  3. Step 3: Cross multiply
    42,665.06x = 63,991.96 × 12,678.66
  4. Step 4: Simplify right side
    42,665.06x = 811,332,271.88
  5. Step 5: Solve for x
    x = 811,332,271.88/42,665.06
  6. Step 6: Final answer
    x = 19,016.32

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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.