Home / 26,424.40-39,640.20-9,780.40

Finding the Fourth Proportional to 26,424.40, 39,640.20 and 9,780.40

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Solution

The fourth proportional to 26,424.40, 39,640.20 and 9,780.40 is: 14,671.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,424.40 : 39,640.20 = 9,780.40 : x
  2. Step 2: Convert to fraction form
    26,424.40/39,640.20 = 9,780.40/x
  3. Step 3: Cross multiply
    26,424.40x = 39,640.20 × 9,780.40
  4. Step 4: Simplify right side
    26,424.40x = 387,697,012.08
  5. Step 5: Solve for x
    x = 387,697,012.08/26,424.40
  6. Step 6: Final answer
    x = 14,671.93

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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.