Home / 25,905-38,869.80-11,118.15

Finding the Fourth Proportional to 25,905, 38,869.80 and 11,118.15

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Solution

The fourth proportional to 25,905, 38,869.80 and 11,118.15 is: 16,682.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,905 : 38,869.80 = 11,118.15 : x
  2. Step 2: Convert to fraction form
    25,905/38,869.80 = 11,118.15/x
  3. Step 3: Cross multiply
    25,905x = 38,869.80 × 11,118.15
  4. Step 4: Simplify right side
    25,905x = 432,160,266.87
  5. Step 5: Solve for x
    x = 432,160,266.87/25,905
  6. Step 6: Final answer
    x = 16,682.50

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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.