Home / 28,795.20-39,753.05-19,890.61

Finding the Fourth Proportional to 28,795.20, 39,753.05 and 19,890.61

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Solution

The fourth proportional to 28,795.20, 39,753.05 and 19,890.61 is: 27,459.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,795.20 : 39,753.05 = 19,890.61 : x
  2. Step 2: Convert to fraction form
    28,795.20/39,753.05 = 19,890.61/x
  3. Step 3: Cross multiply
    28,795.20x = 39,753.05 × 19,890.61
  4. Step 4: Simplify right side
    28,795.20x = 790,712,606.46
  5. Step 5: Solve for x
    x = 790,712,606.46/28,795.20
  6. Step 6: Final answer
    x = 27,459.88

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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.