Home / 8,389.40-12,588.41-4,640.49

Finding the Fourth Proportional to 8,389.40, 12,588.41 and 4,640.49

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Solution

The fourth proportional to 8,389.40, 12,588.41 and 4,640.49 is: 6,963.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,389.40 : 12,588.41 = 4,640.49 : x
  2. Step 2: Convert to fraction form
    8,389.40/12,588.41 = 4,640.49/x
  3. Step 3: Cross multiply
    8,389.40x = 12,588.41 × 4,640.49
  4. Step 4: Simplify right side
    8,389.40x = 58,416,402.32
  5. Step 5: Solve for x
    x = 58,416,402.32/8,389.40
  6. Step 6: Final answer
    x = 6,963.12

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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.