Home / 18,836.48-25,999.12-12,870.56

Finding the Fourth Proportional to 18,836.48, 25,999.12 and 12,870.56

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Solution

The fourth proportional to 18,836.48, 25,999.12 and 12,870.56 is: 17,764.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,836.48 : 25,999.12 = 12,870.56 : x
  2. Step 2: Convert to fraction form
    18,836.48/25,999.12 = 12,870.56/x
  3. Step 3: Cross multiply
    18,836.48x = 25,999.12 × 12,870.56
  4. Step 4: Simplify right side
    18,836.48x = 334,623,233.91
  5. Step 5: Solve for x
    x = 334,623,233.91/18,836.48
  6. Step 6: Final answer
    x = 17,764.64

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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.