Home / 25,421.40-38,121.30-12,277.80

Finding the Fourth Proportional to 25,421.40, 38,121.30 and 12,277.80

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Solution

The fourth proportional to 25,421.40, 38,121.30 and 12,277.80 is: 18,411.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,421.40 : 38,121.30 = 12,277.80 : x
  2. Step 2: Convert to fraction form
    25,421.40/38,121.30 = 12,277.80/x
  3. Step 3: Cross multiply
    25,421.40x = 38,121.30 × 12,277.80
  4. Step 4: Simplify right side
    25,421.40x = 468,045,697.14
  5. Step 5: Solve for x
    x = 468,045,697.14/25,421.40
  6. Step 6: Final answer
    x = 18,411.48

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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.