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Finding the Fourth Proportional to 8,642.38, 12,970.05 and 5,360.26

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Solution

The fourth proportional to 8,642.38, 12,970.05 and 5,360.26 is: 8,044.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,642.38 : 12,970.05 = 5,360.26 : x
  2. Step 2: Convert to fraction form
    8,642.38/12,970.05 = 5,360.26/x
  3. Step 3: Cross multiply
    8,642.38x = 12,970.05 × 5,360.26
  4. Step 4: Simplify right side
    8,642.38x = 69,522,840.21
  5. Step 5: Solve for x
    x = 69,522,840.21/8,642.38
  6. Step 6: Final answer
    x = 8,044.41

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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.