Home / 26,288.20-39,412.86-12,421

Finding the Fourth Proportional to 26,288.20, 39,412.86 and 12,421

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Solution

The fourth proportional to 26,288.20, 39,412.86 and 12,421 is: 18,622.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,288.20 : 39,412.86 = 12,421 : x
  2. Step 2: Convert to fraction form
    26,288.20/39,412.86 = 12,421/x
  3. Step 3: Cross multiply
    26,288.20x = 39,412.86 × 12,421
  4. Step 4: Simplify right side
    26,288.20x = 489,547,134.06
  5. Step 5: Solve for x
    x = 489,547,134.06/26,288.20
  6. Step 6: Final answer
    x = 18,622.31

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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.