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Finding the Fourth Proportional to 5,661.40, 8,500.20 and 4,430.20

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Solution

The fourth proportional to 5,661.40, 8,500.20 and 4,430.20 is: 6,651.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,661.40 : 8,500.20 = 4,430.20 : x
  2. Step 2: Convert to fraction form
    5,661.40/8,500.20 = 4,430.20/x
  3. Step 3: Cross multiply
    5,661.40x = 8,500.20 × 4,430.20
  4. Step 4: Simplify right side
    5,661.40x = 37,657,586.04
  5. Step 5: Solve for x
    x = 37,657,586.04/5,661.40
  6. Step 6: Final answer
    x = 6,651.64

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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.