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Finding the Fourth Proportional to 5,920.40, 8,005.50 and 5,920.40

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Solution

The fourth proportional to 5,920.40, 8,005.50 and 5,920.40 is: 8,005.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,920.40 : 8,005.50 = 5,920.40 : x
  2. Step 2: Convert to fraction form
    5,920.40/8,005.50 = 5,920.40/x
  3. Step 3: Cross multiply
    5,920.40x = 8,005.50 × 5,920.40
  4. Step 4: Simplify right side
    5,920.40x = 47,395,762.20
  5. Step 5: Solve for x
    x = 47,395,762.20/5,920.40
  6. Step 6: Final answer
    x = 8,005.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.