Home / 25,411-38,139.90-12,939.94

Finding the Fourth Proportional to 25,411, 38,139.90 and 12,939.94

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Solution

The fourth proportional to 25,411, 38,139.90 and 12,939.94 is: 19,421.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,411 : 38,139.90 = 12,939.94 : x
  2. Step 2: Convert to fraction form
    25,411/38,139.90 = 12,939.94/x
  3. Step 3: Cross multiply
    25,411x = 38,139.90 × 12,939.94
  4. Step 4: Simplify right side
    25,411x = 493,528,017.61
  5. Step 5: Solve for x
    x = 493,528,017.61/25,411
  6. Step 6: Final answer
    x = 19,421.83

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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.