Home / 21,777.61-30,054.85-12,705.76

Finding the Fourth Proportional to 21,777.61, 30,054.85 and 12,705.76

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Solution

The fourth proportional to 21,777.61, 30,054.85 and 12,705.76 is: 17,534.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,777.61 : 30,054.85 = 12,705.76 : x
  2. Step 2: Convert to fraction form
    21,777.61/30,054.85 = 12,705.76/x
  3. Step 3: Cross multiply
    21,777.61x = 30,054.85 × 12,705.76
  4. Step 4: Simplify right side
    21,777.61x = 381,869,710.94
  5. Step 5: Solve for x
    x = 381,869,710.94/21,777.61
  6. Step 6: Final answer
    x = 17,534.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.